| abatement (pollution) | abiogenesis | abiotic |
| abiotic components | ablation | aboringe |
| abrasion | abscission | absolute humidity |
| absolute instability | absorbed water | absorbent |
| absorption | absorption spectrum | abundance |
| acacia | accelerated erosion | acceleration |
| acceptable daily intake | acceptable noise standard | accessory mineral |
| accidental species | accidental violation | acclimation |
| acclimatisation | accounting for nature | accretion |
| accretion theory | accumulation | accumulation zone |
| accumulator plant | accuracy | achieving sustainability |
| acid | acid (acidic) rock | acid and base |
| acid deposition | acid mine drainage | acid rain |
| acid soil | acid soot | acidity |
| acidophilous | acquired character | actinomycetales |
| action spectrum | activated carbon | activated charcoal |
| activated sludge | activated sludge process | activation |
| activation energy | activator | active flood plain |
| active immunity | active transport | activism |
| acute effects | adaptation | adaptive radiation |
| adaptive threshold | adaptive value | adaptive zone |
| adb (asian development bank) | addiction | additive mortality |
| additives | adiabatic (change) | adiabatic gradient |
| adiabatic lapse rate | adiabatic process | adirondack mountains |
| adsorbed water | adsorption | adulterants |
| adulteration | advanced waste treatment | advection |
| adventitious root | adventive plant | aeogenic |
| aeolian deposit | aeration | aeration, soil |
| aerial reconnaissance | aerial root | aerial spraying |
| aerial survey | aeroallergen | aerobic |
| aerobic / anaerobic system | aerobic bacteria | aerobic biological oxidation |
| aerobic composting | aerobic decomposer | aerobic process |
| aerobic respiration | aerobic sludge digestion | aerobic waste treatment |
| aerology | aestivation | aetiology |
| afforestation | africanized bees (apis mellifera scutellata) | afterburner |
| age | age class | age distribution |
| age structure | age structure pyramid | ageing |
| agent orange | agglomeration | aggradation |
| aggregate | aggression | agricultural chemicals |
| agricultural chemistry | agricultural drought | agricultural economics |
| agricultural engineering | agricultural geology | agricultural investigation |
| agricultural land | agricultural meteorology | agricultural pollution |
| agricultural region | agricultural revolution | agricultural revolution stages |
| agricultural science | agricultural stabilization and conservation service | agricultural waste |
| agrobiology | agroecology | agroforestry |
| agrology | agronomy | agrophilous |
| agrostology | aids (aquired immune deficiency syndrome) | air |
| air chemistry | air environment | air pollutant |
| air pollution | air pollution - sources | air pollution control |
| air pollution index | air pollution status | air quality |
| air quality standards | air sampler operation | air stripping |
| air-pollutant transport | airborne diseases | airmass |
| airshed | aitken counter | alar |
| alarm response | alaskan disaster | albedo |
| albinism | albumin | alcoholic fermentation |
| aldrin | algae | algal bloom |
| algal genus index | algal mat | algicide |
| alien species | alimentary canal | alkali metals |
| alkaline soil | alkalinity | alkaloid |
| alkyl sulphonates | allele | allergen |
| alley cropping | allogenic succession | allometry |
| allopatric speciation | alloy | alluvial |
| alluvial land | alluvium | almagorado cattle |
| alpha diversity | alpha particles | alpine tundra |
| alpine zone | alternate agriculture | alternate bearing |
| alternate energy sources | alternate host | alternate technology |
| alternation of generations | altimeter | altitude |
| altitudinal biome | altruism | alvarez hypothesis |
| amazon | amber | ambient |
| ambient noise | ambient pressure | ambient standards |
| amenity | ammonification | amnes test |
| amoco cadiz | amoeba | amoebiasis |
| amorphous | amphimixis | amphiphyte |
| amphoteric | anabatic wind | anabolism |
| anaerobic condition | anaerobic decomposer | anaerobic process |
| anamalous audibility | anatomy | androecium |
| androgen | androgenesis | anemia |
| anemometer | aneomophilous plant | angiosperm |
| angle of indrought | animal behaviour | animal glue |
| animal hauling | animal husbandry | animal rights |
| animal unit | animal waste | animal welfare |
| anion | annelida | annual plant |
| antagonism | antarctic air | antarctic icesheet |
| antarctica | anther | anthracite |
| anthrafilt | anthropo geomorphology | anthropocentric |
| anthropocentrism | anthropogenic effects | anthropogeny |
| anthropological area | antibiotic | antibody |
| antichloronesterase | anticyclone | antigen |
| antiknock additives | antimetabolite | antireflection coating |
| antiserum | antitoxin | aphotic zone |
| apomixis | apomorph | aposematic colouration |
| appetite | appletin layer | application factor |
| applied ecology | aquaculture | aquafalfa |
| aquatic chemistry | aquatic ecosystem | aquatic microbiology |
| aquatic toxicology | aquifer | aquifer restoration |
| arable | arachnid | aral sea |
| arctic air/haze | arctic zone | arenaceous |
| argon | arid | arid landscaping |
| arid zone | aridization | arsenic |
| artesian well | arthropoda | artificial classification |
| artificial fertilization | artificial habitat | artificial rain |
| artificial recharge | artificial reef | artificial regeneration |
| artificial reproduction | artificial selection | asbestos |
| asbestos removal | asbestosis | asexual reproduction |
| ash | ash pit | aspection |
| asphyxiant | assemblage | assimilation |
| assimilative capacity | association | assortative mating |
| asthenosphere | asthma | astroids |
| asulum | atavism | atmometer |
| atmosphere | atmospheric dispersion | atmospheric inversion |
| atmospheric pollutants | atmospheric pressure | atmospheric stagnation |
| atmospheric structure | atmospheric window | atom mass |
| atomic | atomic bomb | atomic energy |
| atomic fission | atomic fusion | atomic number |
| atomic structure | atomization | atp |
| attainment area | attenuation | attrial |
| auger | aurora borealis | australian realm |
| autapomorph | autecology (ecv.) | autoclave |
| autogamy | autogenic succession | autolysis |
| automatic weather station (aws) | automobile emission | automobile emission control |
| autotroph | auxin | auxotroph |
| available energy | available nutrient | available water |
| avalanche | aves | avoidance |
| avulsion | axil | azonal soil |
| bacillariophyta | back flow | back mutation |
| background extinction | background radiation | backhoe |
| backshore | bacteria | bacteriophage |
| bacteroicide | bacteroid | baffle |
| bag limit | bag seive | bag survey |
| bagasse | bagfilter | baghouse |
| baikal lake | bait | bakeries |
| balance in nature | balanced fertilizer | baltic sea |
| band | bank erosion | bark |
| barograph | barometer | barrage |
| basal metabolic rate | basalt rock | baseline survey |
| basic rock | basin | basin irrigation |
| battersea gas washing process | beaufort scale | beckman process |
| behavioural ecology | bell-weather species | benchmark |
| beneficial use | benthic organism | benzene |
| benzo(a)pyrene | berberis vulgaris | bergeron findeisen mechanism |
| beta diversity | beta particle | bhopal disaster |
| bhopal episode | bhopal tragedy | biennial |
| bigbang theory | binomial nomenclature | bioaccumulate |
| bioaccumulation | bioaerosols | bioassay |
| bioassay organism | biocentric | biochemical activity |
| biochemical oxygen demand | biochore | biochronology |
| bioclimatology | biocoenosis | bioconcentration |
| biodegradable (adj) | biodegradable (n) | biodegradable plastics |
| biodegradation | biodiversity | biodiversity conservation |
| biodiversity loss | biodiversity related legislations | biodynamic farming |
| biodynamics | bioenergetics | biofertilizer |
| biofilters | biofouling | biofuel |
| biogas | biogenesis | biogeochemical cycle |
| biogeochemistry | biohydrometallurgy | biological amplification |
| biological benchmark | biological clock | biological community |
| biological control | biological indicator | biological methylation |
| biological monitoring | biological organism | biological oxygen demand |
| biological pesticides | biological productivity | biological resources |
| biological rhythms | biological shield | biological treatment |
| biological warfare | biological weapons | biology |
| bioluminescence | biolysis | biomagnetism |
| biomagnification | biomass | biomass energy |
| biomass fuel | biome | biomedical waste |
| biomedical waste management | biometeorology | biomethanation |
| biomonitoring | biopark | biopesticide |
| biopiracy | bioregion | bioregionalism |
| biosequence | biosolids and sludge management | biosphere |
| biosphere reserve | biostimulant | biostratigraphy |
| biosynthesis | biosystematics | biota |
| biotechnology | biotelemetry | biotic |
| biotic association | biotic community | biotic components |
| biotic factors | biotic index | biotic potential |
| biotic pyramid | biotic succession | biotic transformation |
| biotope | biotopographic unit | biotroph |
| biotype | bioventing | bioweedicides |
| biozone or biostratigraphic units | birth defects | birth rate |
| bisexual | black hole | black lung disease |
| black snow | black soil | black water |
| blackout/brownout | blanket bog | bleaching |
| bloom | blow by | blue baby syndrome |
| blue revolution (fish farming) | blue-green algae | bog |
| bole | bomb calorimeter | bordeaux mixture |
| border strip irrigation | bore | boreal |
| boreal climate | boreal forest | borehole lithology |
| botanical garden | bottle bill | bottle gas |
| botulism | bougain-ville mine | boulder |
| boundry layer | box trap | brackish |
| brackish water | break water | breakpoint chlorination |
| breed | breeder reactor | breeding |
| brewary-wine manufacture | briquette | broiler |
| bronchial diseases | bronchitis | brown fields |
| browse | bubble bursting | buffer |
| buffer zone | bulk density | bund |
| burden of proof | bureau of mines | burried soil |
| c pathway | cadmium | calcareous soil |
| calcicole | calcium cycle | calorie |
| calorific value | calyx | cam pathway |
| cambium layer | camouflage | canadian deutrium - uranium reactors |
| canal irrigation | cancer | canker |
| canopy | capillarity | capillary (adj) |
| capillary action | capillary moisture | capillary pore |
| captive breeding | captive probagation and reintroduction | carbamate (group of pesticides) |
| carbaryl | carbohydrate | carbon |
| carbon adsorption | carbon assimilation | carbon budget |
| carbon cycle | carbon dating | carbon dioxide |
| carbon dioxide method | carbon emission | carbon monoxide |
| carbon offsets (co-emission offsets) | carbon sink | carbon source |
| carbon tax | carbonation | carbonic acid |
| carboniferous period | carbonization | carcinogen |
| carnivore | carrion | carrying capacity |
| cartel | cascade | casein |
| cash crop | castration | catabolism |
| catadromous | catalysis | catalyst |
| catalytic converter | catastrophic evolution | catastrophism |
| catastrophy | catch crop | catchment area |
| catena | cation | cation exchange |
| cation exchange capacity | cattle | caustic scrubbing |
| cell | cell differentiation | cell division |
| cell growth | cell membrane | cell theory |
| cell wall | cement | cenozoic era |
| census | centers for disease control and prevention | central pollution control board |
| centre of diversity | centre of origin | cereal |
| certification sample | cesium | cesspool |
| chain reaction | channel | channel improvement |
| channel storage | channel terrace | characteristic species |
| charcoal | chelate | chemical |
| chemical evolution | chemical gardening | chemical hazards |
| chemical oxidation | chemical oxygen demand | chemical pollutants |
| chemical precipitation | chemical spills | chemical waste |
| chemical weapon | chemical weed control | chemoautotroph |
| chemosynthesis | chernobyl disaster | child survivial revolution |
| chimney | chimpanzee | china syndrome |
| chinampas | chipko andolan movement | chlorache |
| chloramine | chlordane | chlorination |
| chlorine monoxide | chloro fluoro carbon (cfc) | chlorofluro methane (freons) |
| chlorophyll | chlorosis | cholera |
| choline | cholinesterase inhibitor | chromatography |
| chromo radiometer | chromosome | chromosome map |
| chromosome theory of heredity | chronic effects | chronic toxity |
| chronometic stratigraphy | chronometry | cigarette smoke |
| circadian behaviour | circadian rhythm | classification methods |
| classification, biological | clay | clay complex |
| clay composition | clay hard pan | clay mineral |
| clean air act | clean coal technology | clean water act |
| cleaner production | clear air | clear cutting |
| clearing | climate | climate change |
| climate classification | climate cycle | climate modelling |
| climate properties | climate system | climatic forecast |
| climatic prediction | climatic station | climatography |
| climatology | climax (ecological) | climber |
| cline | clod | clone |
| closed canopy | cloud | cloud chemistry |
| cloud classification | cloud droplet | cloud forest |
| cloud formation | cloud seeding | cloudbase |
| cloudburst | cloudcover | clover trap |
| coadaptation | coagulant aid | coagulation |
| coal washing | coalification | coase theorem |
| coast line | coastal plain | coastal water quality |
| coastal wetland | coastal zone management act | cocoon |
| cocos nucifera (coconut palm) | coevolution | coexistence |
| cogeneration | coke | coliform bacteria |
| collective action | colonization | combined sewer overflows (cso) |
| combustion residues | cometabolism | commensalism |
| commercial extinction | commercial fishing | commercial harvest |
| commercial waste management | communicable diseases | communication |
| community | community ecology | community forestry |
| compaction | comparative advantage | comparative risk |
| compensation level | complementary gene | compost |
| compression | condensation | condensation nuclei |
| condensation sampling | confined aquifer | congestion |
| conifer | conservation easement | conservation of biodiversity |
| conservation of energy | conservation status | conservation tillage |
| conservative properties of air | constant level balloon | constant species |
| constitutional provisions | constructive wave | consumer |
| consumerism | contagious | contaminant |
| contaminated soil | contemporary city | continental climate |
| continental drift | continental margin | continental shelf |
| continental slope | continential rise | contour map |
| control of gaseous pollutants | conurbation | convection |
| convection current | conventional pollutant | conventional tillage |
| convergent evolution | cooling pond | cooling tower |
| coprecipitation | coral reefs | cork |
| cornucopian premise | corolla | correlation |
| corridor | corrosion | corrosion and material degradation |
| corrosive (adj) | corruption | cortex |
| cosmic radiation | cosmology | cost-benefit analysis |
| cotyledon | cover | crater |
| crepuscular rays | crisscross inheritance | criteria pollutant |
| critical link | critical mass | critical organ |
| critical reaction | critically endangered species | crop |
| cross breeding | crumbly (adj) | crust |
| crustacean (adj) | cryogenics | cryophyllic |
| cryosphere | cryptic colouration | cryptobiosis |
| cs gas | cultural eutrophication | cultural forestry |
| cultural operations | culture | cutting |
| cyanidation | cyanides | cyanobacteria |
| cybernetics | cyclic population | cyclone |
| cyclone collector | cytogenetics | cytology |
| cytolysis | cytotaxonomy | cytotype |
| damping off | dams (environmental effects) | dark fog |
| dark mineral | dart gun | darwinism |
| dead zone | death rate | debt for nature swap |
| decibel | decline spiral | decomposer |
| decomposition | decontamination | decreaser species |
| deep ecology | deep sinking of liquid waste | deep-sea deposit, abyssal deposit |
| deep-well injection | deficiency | definition of radiometric age |
| deflation | deforestation | degeneration |
| degradation | degradation of land | degreasing |
| dehumidifier | delayed density dependent | delayed neutrons |
| deletion | demand curve | deme |
| demographic transition | demography | dendrochronology |
| dendrology | dendrometer | denitrification |
| denitrifying bacteria | dense forest | density |
| denudation | deodoriser | depasture |
| deposit | deposition | depression |
| derelict land | dermaptera (earwigs) | derris |
| desalination | desert | desert soil |
| desert varnish | desert vegetation | desertification |
| design for disassembly | dessicator | desulphurisation |
| detector | detergent | determinate growth |
| detoxification | detrital pathway | detritivore |
| detritus | deuterium | development |
| development values | devolopment of soil | devonian period |
| dew | diadromous | diagenesis |
| dialysis | diamond | dichloro diphenyl trichloroethane |
| die-off | dieback | diffusion |
| dioecious | dipterocap | direct competition |
| directional selection | discharge | discount rate |
| dishpan experiments | disinfectant | disinfection |
| dispersed soil | dispersion | dispersion model |
| displacement | disposable diapers | disruptive colouration |
| disruptive selection | dissemination | dissolved oxygen |
| dissolved solids | distillery waste | disturbance |
| diurnal | diurnation | divergence |
| divergent evolution | diversification | diversified farming |
| diversifying selection | diversion dam | diversion terrace |
| diversity | diversity index | dna finger printing |
| dodo | doldrums | domestic biodiversity |
| domestication | domin scale | dominance |
| dominant | dominant allele | dominant gene |
| donora smog incident | dormancy | dose response |
| doubling time | down draft | downland vegetation |
| downsing | drain | drainage |
| drainage basin | drainage pattern | draught animal |
| dredge | dressing | drift |
| drift nets | drilling mud | drip |
| drip irrigation | drive net | drizzle |
| drought | drought cycle | dry air |
| dry alkali injection | dry farming | dry feed |
| dry fog | dry heat | dry ice |
| dry land | dry mash | dry season |
| dryland farming | dumping | dune |
| dunes and dune erosion | duplicate gene | duplication |
| dust | dust bowl | dust collector |
| dust devil | dust formulation | dust mulch |
| dust-storm | duster | dutch elm disease |
| dwarf | dynamic equilibrium | dynamics |
| earth | earth charter | earth day |
| earth resources technology satellite (erts) | earth summit | earthwatch programme |
| earthworm | ecad | ecdysis |
| ecesis | echo | ecoanarchism |
| ecocide | ecocline | ecojustice |
| ecological (biological) integrity | ecological (environmental) economics | ecological agriculture |
| ecological association | ecological balance | ecological capacity |
| ecological climatology | ecological community | ecological concepts |
| ecological consumers | ecological crisis | ecological dominance |
| ecological efficiency | ecological energetics | ecological engineering systems |
| ecological factor | ecological genetics | ecological indicator |
| ecological niche | ecological optimum | ecological pyramid |
| ecological resilence | ecological restoration | ecological risk assessment |
| ecology | ecomark | economic growth and the environment |
| economic model | economic rent | ecoregion |
| ecosophy | ecosystem | ecosystem collapse |
| ecosystem function | ecosystem health | ecosystem integrity |
| ecosystem management | ecosystem modelling | ecosystem rehabilitation |
| ecosystem restoration | ecosystem structure | ecotoge |
| ecotone | ecotourism | ecotoxicology |
| ecotype | ecotypic variation | ectocrines |
| ecumenopolics | edaphic | edaphic factor |
| edaphology | effective height of emission | effective population size |
| effective porosity | effective precipitation | efficient allocation of resources |
| effluent | effluent charge | effluent standard |
| effluent tax | effluent treatment plants | ejestion |
| ekistics | el nino | electric crimeatoria |
| electric utilities | electrical energy | electro therapy |
| electro-osmosis | electromagnetic radiation | electromagnetic spectrum |
| electron acceptor and donor | electrostatic filter | electrostatic precipitation |
| electrostatic precipitators | electrotwinning | element |
| elmo bumpy torus | elutriation | eluviation |
| embioptera emblids | embryo | emergency trap |
| emigration | emission | emission control measure |
| emission factor | emission level | emission rate |
| emission trading | emphysema | emulsifier |
| encroach law | endangered species | endemic disease |
| endemic species | endemism | endergonic reaction |
| endogamy | endogenetic energy | endothermic reaction |
| endotoxin | energy | energy analysis |
| energy and the environment | energy auditing | energy budget |
| energy crisis | energy flow & food chains | energy intensity |
| energy of storms | energy policy | energy recovery |
| energy sources | energy strategies | energy technology |
| enhanced greenhouse effect | enology | enteric bacteria |
| enterotoxin | entropy | environment |
| environmental accounting | environmental aesthetics | environmental analysis |
| environmental audit | environmental awareness | environmental bench marking |
| environmental biology | environmental capacity | environmental chemistry |
| environmental clearance | environmental conservation | environmental cost |
| environmental crisis | environmental damage costing | environmental database |
| environmental degradation | environmental dispute resolution | environmental economics |
| environmental education | environmental enforcement | environmental engineering |
| environmental ethics | environmental gradient | environmental health |
| environmental history | environmental impact assessment (eia) | environmental impacts of coal |
| environmental indicator | environmental informatics | environmental justice |
| environmental law | environmental legislation | environmental literacy |
| environmental management of aquaculture | environmental medicine | environmental monitoring |
| environmental organization | environmental policy | environmental priorities |
| environmental protection | environmental protection act | environmental protection agency (epa) |
| environmental racism | environmental refugee | environmental reporting |
| environmental resistance | environmental resources | environmental risk assessment |
| environmental science | environmental standards | environmental statistics |
| environmental stress | environmental variance | environmentalism |
| environmentally responsible investing | environmentally sensitive area | enzootic |
| enzyme | ephemeral | ephemeral lake |
| ephemeral species | epidemic | epidemology |
| epigeal | epilithic | epipelagic |
| epipelic | epiphyte | epistasis |
| epizootic | epoch | equatorial easterlies |
| equatorical trough | equilibrium | equilibrium population |
| equilibrium species | equinox | equitability |
| era | eradication | ergot |
| erodible | erosion | erosion control |
| erosion resistant crop | erosional zone | essential host |
| essential mineral | estivation | estuary |
| ethanol | ethical investment | ethiopian realm |
| ethnic community | ethnobiology | ethnobotany |
| ethnology | ethnozoology | ethogram |
| etholgy | ethonocentrism | etiolating (etp) |
| eugenics | eukaryote | eulittoral zone |
| euphotic zone | eury | eustasy |
| eutectic | eutrophic | eutrophic lake |
| eutrophication | evaporation | evaporation pan |
| evaporation pond | evaporimeter | evapotranspiration |
| everglades | evergreen | evolution |
| evolution of atmosphere | evolutionary lineage | evolutionary species |
| evolutionary zone | ex situ conservation | exaptation |
| exchange capacity | exchange pool | exchangeable ion |
| exclusion principle | exclusive economic zone | exclusive species |
| excretion | exergonic reaction | exhaust gas recirculation |
| existence value | exobiology | exogenetic energy |
| exogenous | exoskeleton | exosphere |
| exothermic | exotic species | exotoxin |
| experimental lakes area | exploitation | exploitative competition |
| exploiter | exploratory behaviour | exponential growth |
| expressivity | expropriate (v) | external cost |
| extinction | extraction | extraterrestrial region |
| extreme temperature | extrinsic factor | extrinsic resources |
| extrusion | exxon valdez | eye of storm |
| fabric | fabric filter | facilitation |
| factor, specific | factors of production | factors, income |
| facultative microbe | facultative organism | faeces |
| faithful species | fallout | fallout wind |
| fallow | false fruit | false ring |
| family | famine | fanning |
| farm | farm animal | farm budgeting |
| farm economics | farm forestry | farm irrigation |
| farm loss | farm management | farm planning |
| farmer | farming | farmstead |
| farmyard manure | fault | fault types |
| fauna | faunal region | feasibility study |
| fecundity | feed | feed supplement |
| feedback | feedback mechanism | feedback system |
| feeder root | feeding habit | feeding standard |
| feedlot runoffs | feedlots | feedstock |
| felling series | felling, preparatory | felony |
| fen | feral | feral crop |
| feral species | fermentation | fertility |
| fertilization | fertilizer | fertilizer analysis |
| fertilizer formula | fertilizer waste | fibre |
| fibre crop | fibre glass | fibric layer |
| fidelity class | field capacity | field ornithology |
| field stripcropping | field work | filial imprinting |
| filicales | filling c | filters |
| filtration | final host | fingerprint method |
| finite resource | fire | fire ants |
| fire clay | fire ecology | fire fighting |
| fire ground | fire line | fish |
| fish culture | fish kill | fish manure |
| fish-pond fertilizer | fisheries | fishery conservation |
| fishery management | fishery science | fishing |
| fishing ground | fission | fission |
| fission in monkey group | fitness | fixation |
| flame cultivators | flame photometry | flame-thrower |
| flash flood | fleet | flight intercept trap |
| floatation | flocculation | flocculator |
| flood | flood control | flood forecasting |
| flood frequency | flood irrigation | flood plain |
| flood proofing | flood tide | flooding |
| flora | flora province | floriculture |
| flow equalisation | flow in ecosystem | flower |
| flowering plants | flue | flue gas |
| flue gas desulphurisation | flue-gas scrubbing | fluid feeder |
| fluidized bed combustion | fluorescence | fluoridation |
| fluorine | fluorocarbons | fluorosis |
| fluvial | fluvial erosion | fluvial transportation |
| flux | fly ash | flysch |
| flyway | foam | fodder |
| fodder crop | foehn wind | foetus |
| fog | fog showers | folding |
| folding types | foliage | food |
| food additives | food and drug administration (fda) | food borne infections |
| food poisoning | food policy | food pollution |
| food preservation | food processing | food security |
| food waste | food web | food-chain |
| food-chain efficiency | food-chain mutualism | foot and mouth disease |
| foraging | forb | foredune |
| foregut fermenter | forenisc radiology | forest conservation |
| forest decline | forest ecology | forest economics |
| forest engineering | forest environment | forest fire |
| forest floor | forest lands | forest products |
| forest resource | forest right | forest roles |
| forest service | forest types | formation |
| formation water | fossil | fossil fuel |
| fossil turbulence | fossil water | fossorial |
| founder effect | founder genome | fragmentation |
| free riders | free trade | freezing nucleus |
| freezing rain | freon | fresh water ecology |
| freshwater | freshwater resources | fringing forest |
| front end loader | frontier economy | frost |
| frost heaving | frost point | froth |
| frugivore | fruit | fruit processing |
| fuel | fuel cells | fuel efficiency |
| fuel resource | fuel rod | fuel switching |
| fuel wood | fuel wood crisis | fugitive emissions |
| fugitive species | fume | fumigation |
| function | functional response | fundamental niche |
| fungicide | fungus | funnel trap |
| fusion energy | fusion reactor | future generations |
| galapagos islands | game animal | game preserves |
| game reserve | game theory | gamma ray |
| gangue | garbage | garbology |
| garden | garden city | garden land |
| gas | gas cap | gas chromatography |
| gas mask | gaseous emission | gaseous exchange |
| gaseous pollutant | gasification | gasifier |
| gasoline | gastransfer | gastropods |
| gatt | gause principle | gdp |
| gelatin | gene | gene bank |
| gene clone | gene duplication | gene ecology |
| gene library | gene pool | gene resource centre, genelibrary |
| gene shear | gene therapy | gene transfer |
| general adaptation | general adaptation syndrome | general circulation |
| generalist | genetic complex | genetic conservation |
| genetic counselling | genetic diversity | genetic drift |
| genetic engineering | genetic erosion | genetic finger printing |
| genetic frequency (allelle frequency) | genetic imprinting | genetic isolation |
| genetic load | genetic map | genetic mapping |
| genetic pollution | genetic polymorphism | genetic purity |
| genetic resistance (or genetic tolerance) | genetic resources | genetic screening |
| genetic selection | genetic shift | genetic system |
| genetic variance | genetically engineered organism | genetically modified crops |
| genetics | genotype | genus |
| geobiont | geobotanical anomaly | geobotanical prospecting |
| geobotany | geochronology | geodegradable |
| geodesy | geographical information system | geographical range |
| geography | geological cycling | geological resources |
| geological survey | geological timescale | geomagnetic induction |
| geomorphology | geophagia | geophysical exploration |
| geophyte | geosere | geosphere or lithosphere |
| geostationary orbit | geostrophic wind | geothermal field |
| geotropism | germ | germ cell |
| germ layers | germ line | germ tube |
| germicide | germination | germplasm |
| gestation | geyser | gill nets |
| glacial cycle | glacial erosion | glacial flood |
| glacial hazard | glacial lake | glacial maximum |
| glacial period | glacier | glaciology |
| gland | glandular response | glazed frost |
| global baseline database | global climate system | global environment monitoring system |
| global positioning system | global radiation | global warming |
| global weather | globalisation | glycogen |
| gmo | gnp | gold mining |
| grade | graded contour furrow | grader |
| gradient | gradient analysis | gradient wind |
| gradualism | graft | grain |
| grain dryer | gram | gram reaction |
| graminivore | graphicacy | graptolites |
| grass | grass cover | grass crop |
| grass eater | grassberg mine | grassland |
| gravel | gravimetric analysis | gravimetry |
| gravitational field | gravitational water | gravity |
| grazing | grazing capacity | grazing ground |
| grazing land | grazing pathway | grazing, controlled |
| grazing, defered | grazing, seasonal | great lakes |
| green accounting | green algae | green belt |
| green chemistry expert system | green cross | green house gases potential |
| green manure | green manuring | green packaging |
| green plans | green politics | green products |
| green revolution | green tax | greenbelt movement |
| greenhouse effect | greenhouse gas | greenhouse warming |
| greenpeace | greens | greenwash |
| grey brown podzolic soils | greyair city | grit |
| grooming | gross domestic product (gdp) | gross ecological efficiency |
| gross economic value | gross national product | gross primary productivity |
| ground cover | ground fire | ground flora |
| ground fog | ground frost | ground moraine |
| ground rainfall | ground survey | ground water pollution |
| groundwater | groundwater harvesting | groundwater investigation |
| groundwater monitoring | groundwater recharge | groundwater runoff |
| grouping behaviour | grove | growing season |
| growth | growth curve | growth harmone |
| growth inhibitor | growth kinetics | growth limiting factors |
| growth ring | guanotrophy | guard cell |
| guild | gulf stream | gulf war hazards |
| gullied land | gully | gusher |
| gust | guttation | guzzler |
| gymnosperm | gynoecium | gynogensis |
| gyre |
| habit | habitat | habitat diversity |
| haemoglobin | hail | half life |
| halocarbon | halocline | halogens |
| halophile | halosere | handicap principle |
| hanging valley | haploid | haplont |
| hard pan | hard wood | harden off |
| hardness | hardy-weinberg law | harrow |
| harvest method | harvest mortality | harvest quota |
| harvestable surplus | hatchery | haustorium |
| hay | hay fever | hazardous and solid waste related legislation |
| hazardous chemical | hazardous substances | hazardous waste |
| hazardous waste landfill | hazardous waste site remediation | haze |
| heap leach | hearing loss | heat balance |
| heat energy | heat exchanger | heat flux |
| heat pollution | heat pump | heat recovery |
| heat transfer | heathland forest | heavy metal toxicity |
| heavy metals and heavy metal poisoning | heavy metals precipitation | heavy mineral |
| heavy soil | heliophyte | hells canyon |
| helminth | helophyte | hemp |
| herb | herbage | herbal medicine |
| herbarium | herbivore | herbosa |
| herding | hermaphrodite | herpetology |
| hetch hetchy reservoir | hetermorphism | heterogamy |
| heterosis | heterotroph | heterozygosity |
| hibernation | hierarchical classification method | hierarchy |
| high volume air sampling | high volume filtration | high-grading (mining, forestry) |
| high-level radioactive waste | high-solids reactor | high-yielding cereal |
| highly polluted cities | highyielding variety | hill fog |
| hillock tundra | histochemistry | holistic |
| holistic approach | holocaust | holocene |
| holophyly | holophytic nutrition | home range |
| homeopathy | homeostasis | homeotherm |
| homing instinct | hominid | homo erectus |
| homo habilis | homo sapiens | homogamy |
| homogeneity | homologous | homology |
| homozygosity | honey | honeycomb |
| honeydew | hormone weedkiller | horticulture |
| host | hot blast | hot rock |
| hot spot | household cleaner | household waste |
| hubbard brook experimental forest | hubble’s law | human development |
| human equivalent concentration | human evolution | human immunodeficiency virus |
| human priority area | human resources | human rights |
| human-powered vehicles | humanism | humate |
| humic acid | humidification | humidifier |
| humidity | humus | hunger |
| hunting and trapping | hurricane | hybrid zone |
| hybridization | hydrarch succession | hydraulics |
| hydric plant | hydric soil | hydroacoustics |
| hydrocarbon | hydrocarbon cracking | hydrochlorofluorocarbons |
| hydrodynamics | hydroelectricity | hydrofarming |
| hydrofracturing | hydrogen | hydrogen cyanide |
| hydrogen peroxide | hydrogen sulfide (hs) | hydrogenation |
| hydrogeology | hydrograph | hydrologcial drought |
| hydrological civilization | hydrological cycle | hydrological equation |
| hydrolysis | hydrophillic | hydrophily |
| hydrophobia | hydrophyte | hydroponics |
| hydropower | hydroseeding | hydrosere |
| hydrosphere | hydrostatics | hydrotaxis |
| hydrothermal | hydrotropism | hygrometer |
| hygrophilous | hygrophyte | hygroscopic |
| hyperosmatic | hyperphagy | hypertrophic |
| hypogeal | hypothermy | hypoxia |
| hyv |
| i.u.c.n (international union for conservation of nature) | iaa (inodoleacetic acid) | ice age |
| ice evaporation level | ice sheet | ice-cap |
| iceberg | iceblink | idiobiology |
| igneous rocks | illuvial soil | imf |
| immature organism | immature seed | immature soil |
| immigration | immobilization | immunisation |
| immunising agent | immunity | immunogenecity |
| immunology | impermeability | impermeable layer |
| impervious material | impervious soil | implantation |
| imprinting | improductive forest | improve cutting |
| in situ conservation | in situ gene bank | in vitro |
| in vivo | inappropriate technology | inbred line |
| inbreeding | inbreeding depression | incidental catch |
| incineration | incinerator | incipient lethal level |
| incompatibility | incomplete dominance | incubation |
| incubator | indeterminate growth | index |
| index fossil | index species | indicator |
| indicator organism | indifferent species | indigenous community |
| indigenous knowledge | indigenous species | indirect competition |
| indirect use | indirect user | individual distance |
| individualistic hypothesis | induction generator | industrial melanism |
| industrial waste | industrial waste treatment | industrial waste-water |
| industrialization | inexhaustible resource | infanticide |
| infauna | infectious waste | infiltrate (v) |
| infiltration | infinite resource | inflation |
| information index | infralittoral fringe zone | infrared photography |
| infrared radiation | infrasonics | inhabitant |
| inherited character | injection well | inland ice |
| inlier | innate character | innovation |
| inorganic | inorganic compound | insect |
| insecticide | insectivore | instability |
| instinct | institution | insulation |
| insurance | insurance value | integrated environmental conservation |
| integrated natural resource management | integrated nutrition management | integrated pest management |
| integrated waste management | intellectual property right (ipr) | intentional violator |
| interception | intercropping | interdependence |
| interferon | interflow | intergenerational justice |
| interglacial period | interior species | intermediate rock |
| internalizing costs | international agreements on environmental issues | international biological programme |
| international organization for standardization (iso) | international standards | international trade in toxic waste |
| international wildlife coalition | intersex | interspecific |
| interstadial | intertidal zone | intrinstic value |
| introduced specics | introductory stocking | introgression |
| invader species | inverse analysis | inverse stratification |
| inversion | inversion layer | inversity |
| invertebrates | iodine | ion |
| ion exchange treatment | ionisation | ionising radiation |
| ionosphere | iron minerals | irradiation of food |
| irri | irrigation | irrigation efficiency |
| irrigation method | irrigation system | irritant |
| island biogeography | iso-osmotic | isobar |
| isochrone | isogamy | isogeneic |
| isohaline | isohel | isohyet |
| isolating mechanism | isoline | isomer |
| isoseimal line | isotherm | isotope |
| isotopic dating | isotropic | isthmus |
| iteroparity | j-curve | java men |
| jet fuel | jet propulsion | jet stream |
| jetty | joint forest management (jfm) | jumping gene |
| jungle | junk food | jurassic |
| jute | juvenile | juvenile water |
| kame | kaolin | karst |
| karyo type | karyo typing | katabatic wind |
| kay (quay) | keiretsu | kelp |
| kerosene | kesterson national wildlife refuge | ketone |
| keystone species | kick | kiln |
| kin selection | kinaesthetic behavior | kinematics |
| kinesis | kinetic energy | kingdom |
| klinokinesis | klinotaxis | knoll |
| koppen climate classification | krator | kreb’s cycle |
| krill | kudzu |
| labour force | lac | lacquer |
| lactation | lactic acid | lacustrine |
| lagoon | lahar | laissez - faire |
| lake | lake erie | lake forest |
| lake tahoe | land | land - use plan |
| land breeze | land bridge | land capability classiffication |
| land classiffication | land fill | land mine |
| land pollution | land reclamation | land reforms |
| land tenure | land trusts | land-use |
| landrace | landsat | landscape |
| landscape architecture | landscape diversity | landslide |
| lapse rate | large marine ecosystem | larva |
| larviparous | laser | latency |
| latent heat | latent period | lateral line system |
| laterisation | laterite | latex |
| latex (paper) | latitude | lava |
| law of atmosphere | law of energy conservation | law of gravitation |
| law of nature | law of priority | law of tolerance |
| laws of thermodynamics | LD (lethal dose) | leachate |
| leaching | leaching field | lead |
| lead equivalent | lead line | lead management |
| lead net | lead shot | leaf |
| learning | least developed country | lee waves |
| leghold trap | legume | lentic |
| lentic system | lethal gene | lethal mutation |
| leucism | leukaemia | levee |
| level ditching | levelling | ley farming |
| liana | lidar | liebig’s law of minimum |
| life | life assemblage | life cycle |
| life science | life span | life system concept |
| life zone | life-form | life-table |
| light | light rapid transit system (lrt) | light reaction |
| lignin | lignite | lime |
| lime-kiln | limentic zone | limestone |
| limnology | lineage | lineage zone |
| linkage | lipid | liquid limit |
| liquid metal fast breeder reactor | liquifaction | liquified natural gas |
| liquified petroleum gas (lpg) | lithification | lithosol |
| lithostratigraphy | litter | littoral drift |
| littoral fringe | littoral zone | livelihood |
| liverwort | livestock | living fossil |
| loading | loam | local mate competition |
| locomotion | lodging | log |
| logged-over forest | logging (timber trade) | logging concession |
| logistic equation | logistic growth | long-term turbidity |
| longevity | longitude | longshore current |
| longshore drift | longwaves radiation | lost river |
| lotic environment | loudness | love canal |
| low arctic tundra | low cost sanitation | low-head hydroplant |
| lower atmosphere | lower critical temperature index | lower limit of tolerance |
| lowest achievable emission rate (laer) | lunar tides | lymph |
| lysimeter | lysozyme |
| mach number | macrobiota | macrobiotic |
| macroevolution | macrometeorology | macromutation |
| macronutrient | macrophagous | macrophyte |
| mad cow disease | madison process | magma |
| magnet | magnetic anomaly | magnetic dating |
| magnetic field | magnetic separation | magnetism |
| magnetohydrodynamics | magnetosphere | maintenance burn |
| maintenance evolution | maintenance stocking | major community |
| major forest produce | major nutrient | makeup water |
| malaria | malthusian theory | mamma |
| mammal | man-environment relationship | managed forest |
| management of tourism | management plan for bioparks | manatees |
| mangrove | mantle | manure |
| marasmus | marginal land | marginal physical output |
| marginal tax rate | mariculture | marine abrasion |
| marine ecosystem | marine forecast | marine invasion |
| marine park | marine pollution | marine swamp |
| maritime air | market | market system |
| marl | marsh | marsh gas |
| mass | mass burn | mass extinction |
| mass flow | mass production | mass spectrometry |
| mass transit | mass wastage | material cycling in ecosystems |
| material safety data sheets | mating behaviour | maximum permissible concentration |
| maximum permissible dose (mpp) | maximum permissible level | maximum residue limit |
| maximum sustainable yield | meander | measurement and sensing |
| measurement of odour | meat processing | medical waste |
| mediterranean climate | mediterranean forest | mediterranean scrub |
| mediterranean sea | megalopolis | megatherm |
| megathermal climate | meiosis | mendelism |
| mercury | mesic | mesobiota |
| mesoclimate | mesohaline | mesometerology |
| mesophile | mesophyll | mesophyte |
| mesosaprobic | mesothermal climate | mesotidal |
| mesotrophic | mesozoic | metabolic pathway |
| metabolic rate | metabolism | metabolite |
| metagenesis | metalimnion | metals, as contaminants |
| metamorphic rock | metamorphosis | metapopulation |
| metastability | metazoa | meteor |
| meteoric water | meteorological drought | meteorology |
| methane | methane digester | methanogenic |
| methyl tertiary butyl ether | methylation | methylmercury seed dressings |
| micro-ecosystem | micro-element | micro-evolution |
| microbial pest control | microbial toxins | microclimate |
| microconsumer | microcosm | microflora |
| microfossil | microhabitat | micrometeorology |
| micron | micronutrient | microphagous |
| micropropagation | microscale impact calculation | microscope |
| microtherm | microthermal climate | microwaves |
| migmatization | milankovitch weather cycles | mimicry |
| minamata disease | mine | mine spoil waste |
| mineral | mineral cycle | mineral deposit |
| mineral dressing | mineral nutrition | mineralization |
| mineralogy | minimal area | minimum instream flow |
| minimum national standards | minimum viable population | mining |
| mining waste | mining, undersea | ministry of environment and forests |
| minor community | minor forest produce | minor irrigation |
| minor nutrition | miocene | mirage |
| mire | mist | mistral |
| mitosis | mixed cloud | mixed crop |
| mixed economy | mixed farming | mixed grass prairie |
| mixing fog | mixing zones | mixotroph |
| mixture | mobbing | modelling |
| moder | modified mercalli scale | modularism |
| moist tropical forest | moisture budget | molecular biology |
| molecular clock | molecular evolution | molecular marker |
| molecular theory | molecule | mollic |
| mollusca | monitoring | monitoring programme |
| monkey-wrenching | monoecious | monogamy |
| monophagous | monosaccharide | monosex population |
| monotypic | monsoon | moraine |
| more | morphogenesis | morphology |
| morphotectonics | mortality | mortar |
| mosaic evolution | motivational conflict | mottle |
| mould | moulting | mount agung (gunung) |
| mountain | mountain breeze | mountain forest |
| mountain waves | movement | muck soil |
| mud rock | mud slide | mud volcano |
| mud-flat | mudflow | mulch |
| mull | mullarian mimicry | multidimensional niche |
| multiple alleles | multiple chemical sensitivity | multiple landuse strategy |
| municipal sewage | municipal solid waste | municipal solid waste composting |
| mustard gas | mutagen | mutant |
| mutation | mutation rate | mutator gene |
| mutualism | mycelium | mycobacterium |
| mycology | mycophyta | mycorrhiza |
| mycosis | mycotoxin | mycotropy |
| mycovirus | myrmecochory | myrmecophile |
| myrmecophyte |
| nanofossil | nastic movement | natality rate |
| national air toxics information clearing house | national estuary program | national forest |
| national marine fisheries service | national oceanic and atmospheric administration | national park |
| national pollutant discharge elimination system | national primary drinking water regulations | national seashore |
| native classification | native metal | native range |
| native species | natural community | natural disaster |
| natural draught | natural ecosystem | natural enemy |
| natural environment | natural extinction | natural fire |
| natural gas | natural habitat | natural history |
| natural increase | natural oil | natural pollutant |
| natural predator | natural product | natural radiation |
| natural regeneration | natural reserve forests | natural resource classification |
| natural resource economics | natural resource management | natural selection |
| natural subsidence | natural vegetation | natural woodland |
| naturalized organism | nature | nautical mile |
| neanderthal man | neap tide | near natural community |
| near shore | nebula | nectar |
| negative feed back | nekton | nematicide |
| nematoda | neo-darwinism | neoendemics |
| neoplasm | neotectonic | neotropical fanual region |
| neotropical migrants | neritic zone | nerve gas |
| nest | nest parasite | nestling |
| nestling site | net aboveground productivity | net community productivity |
| net production | net production efficiency | net radiation |
| net radiation budget | net radiation deficit | net reproductive rate |
| netropical realm | neuston | neutral mutation |
| neutral mutation theory | neutralisation | neutralism |
| neutron | ngo | niche breadth |
| nicotine | nidicolous | nidification |
| nidifugous | night-soil | nimby |
| nitrate | nitrate pollution | nitrification |
| nitrifying bacteria | nitrogen | nitrogen assimilation |
| nitrogen fertilizer | nitrogen fixation | nitrogen fixing plant |
| nitrogen fixing system | nitrogen oxide | nitrogen removal |
| nitrosamines | noble gas | nocturnal |
| nocturnal radiation | node | nodulation |
| nodule | nodule soil | noise |
| noise control | noise dose | noise dosimeter |
| noise exposure forecast | noise level | noise pollution |
| noise rating curves (numbers) | noise zoning | nomad |
| non-arable land | non-biodegradable | non-combustible refuse |
| non-commercial resource | non-conservative pollutants | non-degradable substance |
| non-game animal | non-homologous chromosome | non-native species |
| non-observable-adverse- effect-level | non-point sources of pollution | non-random mating |
| noncriteria pollutant | nondegradable pollutant | nonrenewable |
| nonrenewable resource | nonsense mutation | nonvascular plant |
| norm of irrigation | normal erosion | normal growing stock |
| normal increment | normal moisture capacity | normal seeding |
| normalising selection | novel protein food | noxious gas |
| noxious industry | npk | nuclear accident |
| nuclear cell | nuclear energy | nuclear explosions |
| nuclear fission | nuclear fuel | nuclear fuel cycle |
| nuclear fusion | nuclear material | nuclear park |
| nuclear power | nuclear powerplant | nuclear radiation |
| nuclear reaction | nuclear reactor | nuclear test ban |
| nuclear waste | nuclear weapon | nuclear winter |
| nucleotide, nuclide | nucleus | numerical abundance |
| numerical response | nurse crop | nurse tree |
| nursery | nutation | nutrient |
| nutrient budget | nutrient cycle | nutrient depletion |
| nutrient immobilization | nutrient solution | nutrient stripping |
| nutrient toxicity | nutrient use efficiency | nutrition |
| nutritional requirement | nymph |
| oasis | obligate organism | observation well |
| observatory | obsolescence | occupational air |
| occupational hazards | occupational noise | occupational pollution |
| ocean | ocean currents | ocean dumping |
| ocean energy resources | ocean outfalls | ocean pollution |
| ocean structure | ocean thermal energy conversion | ocean waves |
| oceanic trench | oceanography | octane number |
| octane rating | odor masking | odour control |
| odours | oestrus (esturs) cycle | off spring |
| off-road vehicles | offensive industry | office of civilian radioactive waste management (ocrwm) |
| offshore beach | offshore gas | offshore mining |
| offshore zone | offsite demand | ogallala aquifer |
| ohligate parasite | oil | oil drilling |
| oil embargo | oil refinery | oil refinery waste |
| oil reserve | oil tanker | oil-sand |
| oil-seepage | oil-shale | oil-slick |
| oil-spill | olfactory | oligocene |
| oligolectic | oligophagous | oligopoly |
| oligosaccharide | oligosaprobic | oligothermic |
| oligotrophic | oligotrophic soil | ombrotrophic |
| omnivore | oncogene | oncogenic |
| oncology | one-crop economy | one-crop economy |
| onsite needs | ontogenesis | oogenesis |
| ooze | open burning | open canopy |
| open community | open country | open drain |
| open dumps | open pollination | open population |
| open system | opencast mine | operative soil depth |
| opportunist violator | opportunistic organism | opportunity cost |
| optical meteor | optimum output | optimum population |
| optimum sustained yield | optimum value | optimum water content |
| optimum yield | option value | order |
| ordovician | ore | ore body |
| ore mineral | organic chemical industry | organic disease |
| organic disorder | organic farming | organic insecticide |
| organic manure | organic matter | organic pollution |
| organic recycling | organic selection | organic waste |
| organism | organismic | organismic viewpoint |
| organochlorine | organophosphate | organotroph |
| oriental fanual region | oriental realm | orientation response |
| ornamental tree | ornithology | ornithophily |
| orogenic rainfall | orogeny | orthogensis |
| orthokinesis | osmophilic | osmoregulation |
| osmosis | osmotic balance | osmotic potential |
| osmotic pressure | osmotrophic | otal oxygen demand |
| out welling | outbreeding | outbreeding depression |
| outcrop | outcrossing | outfall sewer |
| outlier | output | outwash |
| outwash deposit | outwash plain | ovarturn |
| ovary | over burden | over thrust |
| overconsolidated soil deposit | overcrowding | overcultivation |
| overdominance | overdraft | overexploitation |
| overfertilise (v) | overfishing | overflowing well |
| overgrazing | overirrigation | overland flow |
| overpopulation | overseeding | overspecialization |
| overuse | oviparity | ovoviviparity |
| ovulation | ovule | ovum |
| oxidation pond | oxidiation | oxidizing agent |
| oxygen cycle | oxygen demand | oxygen effect |
| oxygen method | oxygen sag | oxygen tension |
| ozonation | ozone | ozone depleting substances |
| ozone depletion | ozone hole | ozone impact |
| ozone layer | ozone layer protection | ozonometer |
| ozonosphere |
| paedogenesis | paedomorphosis | palaebiology |
| palaeoendemic species | palaeogeography | palaeolithic period |
| palaeontology | palaeozoic era | palatable species |
| palearctic realm | paleocene | paleoecology / paleolimnology |
| paleomagnetism | palynology | pangaea |
| panplain | paper | paper mill waste |
| parallel canal | parallel evolution | parallel system |
| parapatric | parapatric speciation | paraphyletic taxon |
| parasite | parasitism | parasitoid |
| parasitology | parataxonomy | paratonic movement |
| paratype | parazoa | parent rock |
| parent soil | parental care | pareto efficiency |
| pareto optimality (maximum social welfare) | park | parthenocarpy |
| parthenogenesis | partial sterilization | particle |
| particle density | particulate pollution | parts per billion (ppb) |
| parts per million (ppm) | parts per trillion (ppt)) | passenger pigeon (ectopistes migratorius) |
| passive solar design | pastoralism | pasture |
| patabiont | patent | pathogen |
| pathogen removal | pathogenesis | pathogenic |
| pathogenicity | pathological waste | pathotoxin |
| pavement | peat | peat soils |
| peatlands | ped | pedicel |
| pediment | pedogenesis | pedology |
| pedon | pekilo process | pelagic |
| penetrability | peptides | percolating filter |
| percolation | percolation pond | percoline |
| peregrine falcon (falco peregrinus) | perennial | perennial stream |
| perennial yield | perfect flower | perfect substituent |
| perianth | periglacial | periphyton |
| permaculture | permafrost | permanent parasite |
| permanent pasture | permanent retrievable storage | permanent village |
| permanent wilting point | permeability | permian |
| peroxyacetyl nitrate (pan) | persian gulf war | persistent compound |
| pest | pesticide | pesticide residue |
| petal | petiole | petrifaction |
| petrifield forest | petrochemical | petrogenesis |
| petrography | petroleum | petrology |
| phaeophyta | phagocytosis | phanerogam |
| phanerozoic eon | phenology | phenotype |
| pheromone | phloem | phoresy |
| phosphagen | phosphate rock | phosphates |
| phosphorescence | phosphorous | phosphorous cycle |
| phosphorus removal | phosphorylation | photic zone |
| photo active radiation (par) | photo ionization | photoautotroph |
| photochemical oxidant | photochemical reaction | photochemical smog |
| photodegradable plastic | photodissociation | photoecology |
| photogeology | photoinhibition | photokinesis |
| photolysis | photometer | photoperiod |
| photorespiration | photosynthate | photosynthesis |
| photosynthetic efficiency | photosynthetic quotient | photosystem |
| phototroph | photovoltaic cell | phreatic zone |
| phreatophyte | phyletic evolution | phyllotaxy |
| phylogeny | phylum | physical hazards |
| physiocracy | physiognomy | physiographic succession |
| physiology | phytoalexin | phytochrome |
| phytogeocoenosis | phytoplankton | phytoremediation |
| phytosociology | phytotoxin | piezometer |
| pigments | pioneer community | pisces |
| pisciculture | pit | pitch |
| pitcher irrigation | pith | pitot tube |
| placer mining | plagioclimax | plagiosere |
| plankton | plant | plant association |
| plant bog sere | plant breeding | plant classification |
| plant community | plant cover | plant ecology |
| plant formation | plant functional attribute | plant geography |
| plant kingdom | plant litter | plant nutrient |
| plant pathology | plantation | plantsere |
| plasma | plasmolysis | plastic pollution |
| plastic recycling | plastic soil | plastid |
| plastron | plate | plate tectonics |
| plate tectonics theory | plateau | platinoid |
| playa | pleistocene | pleomorphism |
| pliocene | plow pan | plug |
| plume | plutonium | pluvial |
| pluvial period | pneumatophore | poaching |
| podsol | poikilosmatic | poikilotherm |
| point data | point mutation | point source |
| point source pollution | poison | pole |
| pollard | pollarding | pollen |
| pollen analysis | pollination | pollutant |
| polluter pays principle | pollution | pollution by aquaculture |
| pollution control | pollution control in tanneries | pollution control in textile industry |
| pollution description of tanneries | pollution prevention | pollution problems |
| pollution problems in chemical industry | pollution problems in tanneries | pollution regulation |
| polonium | poly specific association | polyandry |
| polychlorinated biphenyl | polyculture | polycyclic aromatic hydrocarbons (pah) |
| polygamy | polygene | polygenic inheritance |
| polygyny | polymer | polymorphism |
| polyphyletism | polyploidy | polytopic evolution |
| polytypism | polyvinyl chloride (pvc) | pond |
| poppy | population | population biology |
| population cycle | population density | population dynamics |
| population ecology | population eruption | population explosion |
| population genetics | population growth | population regulation |
| population, soil | pore | pore pressure |
| porosity | postglacial period | postmodernism and environmental ethics |
| potable water | potassium | potential climax forest |
| potential energy | potential temperature gradient | potential transpiration |
| poverty line | power line | power plants |
| prairie | precautionary principle | precipitation |
| precycling | predation | predator |
| predator control | predatory price cutting | preliminary treatment |
| presence indicator | preservation | preservative |
| prevailing wind | price elasticity of demand | primary air pollutants |
| primary consumer | primary mineral | primary pollutant |
| primary value | primary, secondary and tertiary treatments | primitive |
| principle of seggregation | prisere | privatization |
| prodelta | producer | production |
| production ecology | production of ecosystems | production possibility |
| productive soil | productivity | profoundal zone |
| progeny | progressive evolution | progressive feeding |
| progressive succession | project tiger | prompt neutrons |
| propagule | protandry | protected area |
| protein | protest | protist |
| protogyny | proton | protoplasm |
| protore | protosoil | protozoa |
| prune | psammophyte | psammosere |
| pseudocopulation | pseudofossil | pseudomorph |
| pseudopodium | pseudosteppe | psychrometer |
| pteridophyte | puddle | puddled soil |
| puddling | pulses | pumice |
| pumped storage | pumped storage dam | pumping station |
| punctuated equilibrium | pure line | pure seed |
| putricible waste | pyramid of food | pyroclastic material |
| pyroclastic rock | pyroheliometer | pyrometer |
| pyrrophyta (fire algae) |
| quad | quadrant | quadrate method |
| quagmire | quake | quaking bog |
| quality assurance | quality class | quality control |
| quality of life | quantum | quantum electrodynamics |
| quantum electronics | quantum evolution | quantum field theory |
| quantum number | quantum theory | quarantine |
| quark | quarry | quarrying |
| quartan fever | quartz | quartzite |
| quaternary consumer | quaternary period | quench layer |
| quenching | quercus | quick clay |
| quick flow | quick lime | quick sand |
| quick silver | quick test | quick water |
| quiescent | quilted surface | quinine |
| quininism | quota |
| r-selection | rabies | race |
| rachis | racial discrimination | rad |
| radar | radar tracking | radial drainage |
| radial symmetry | radiant energy | radiation |
| radiation dose | radiation ecology | radiation exposure |
| radiation flux | radiation fog | radiation pressure |
| radiation sickness | radiation units | radiatively active gas |
| radio active | radio tracking | radioactive damage |
| radioactive decay | radioactive emanation | radioactive equilibrium |
| radioactive material | radioactive pollution | radioactive series |
| radioactive tracer | radioactive wastes | radioactivity |
| radiobiology | radiography | radioisotope |
| radioisotope imaging | radiology | radiometer |
| radium | radon gas | rain |
| rain crust | rain excess | rain guage |
| rain making | rain out | rain shadow |
| rain water | rainbow | raindrop erosion |
| rainfall | raised beach | random assortment |
| range | range ecology | range land |
| range management | rapids | rare earth element |
| rare gas | rate of run-off | ratify |
| rational decision | rational expectation | raunkiaer’s life-forms classification |
| ravine | raw material | re-entrainment |
| re-radiation | reaction turbine | reaction, soil |
| real gdp per capita | real price | realised niche |
| recalcitrant | recalcitrant seed | recarbonation |
| receptor | recession | recharge |
| reciprocal altruism | reciprocal crosses | reclaim |
| reclamation | recombinant DNA technology | recombination |
| recreatability | recreation ecology | rectangular speciation |
| recurrent parent | recurrent selection | recycle |
| recycling | recycling sewage | red algae |
| red beds | red clay | red data book |
| red list | red tide | redirected behaviour |
| reduzate | reed | reef |
| reef trap | refeeding of waste | refining |
| reflected wave | reflection | reflectivity |
| reflex | reflex action | refracted wave |
| refraction | refractive index | refrigerant |
| refuge | refugees | refugium |
| refuse - derived fuels (rdf) | reg | regional park |
| regional planning | regional sea | registered seed |
| regression | regulating reservoir | regulatory gene |
| rehabilitation | rehabilitation of dumpsites | reintroduction |
| rejuvenation | relative abundance | relative age |
| relative biological effectiveness | relative humidity | relative importance value |
| relay cropping | release cutting | relic |
| relict sediment | relict species | relief drawn |
| relief map | religion and the environment | rem |
| remedial investigation | remediation | remote sensing |
| renewable resource | repel | repellant |
| replacement | reporter gene | reproduction |
| reproduction effort | reproduction isolating mechanism | reproduction rate |
| reproductive allocation | reproductive isolation | reptile |
| reserve food | reservoir | reservoir pool |
| reservoir rock | reservoir sedimentation | residence time |
| residual reproductive value | resilience | resilin |
| resin | resistance | resistance breaking biotope |
| resistance breaking biotype | resistant residue | resonance |
| resource | resource availability | resource base |
| resource consumption | resource distribution | resource gathering activity |
| resource inventory | resource management | resource pollution |
| resource processing | resource recovery | resource recycling |
| resource scarcity | resources reserve | respirable dust |
| respiration | respiration quotient (rq) | respiratory diseases |
| respiratory pigment | resting metabolic rate | restoration |
| restoration ecology | restorer gene | retarded timing |
| retension period | reticulate evolution | retrievable storage |
| retrogression | retting | return period |
| reuse | reverse genetics | reverse mutation |
| reverse osmosis | rhizobium | rhizosphere |
| rhodophyta | ria | richter scale |
| rickets | ridge | rift valley |
| right-to-know | rill | ring species |
| ring spot | rip current | riparian habitat |
| riparian land | riparian rights | ripple |
| riprap | risk analysis | risk assessment (public health) |
| risk assessors | ritualization | river |
| river bar | river basin | river bed |
| river blindness | river capture | river cliff |
| river drift | river flow | river network |
| river pollution | river profile | river system |
| river terrace | river tide | river valley |
| river valley project | river wash | river zones |
| rna | road | rock cycle |
| rock debris | rock formation | rock glacier |
| rock sand clay sere | rock weathering | rodent |
| rodenticide | root | root nodule |
| root pressure | root-shoot ratio | rotation |
| rotation grazing | rotation pasture | rotifera |
| row crop | rubbish | run-off |
| run-off cycle | run-off pit | run-off plot |
| runaway hypothesis | rural - urban migration | rural land use planning |
| rust |
| sacred grove | safety equipment | safety lamp |
| safety measure | sahel | saline alkali soil |
| saline giant | saline sodic soil | salinity |
| salinization | salinization of soil | salmon |
| salt | salt (road) | salt affected soil |
| salt balance | salt dome | salt field |
| salt fingering | salt index | salt lake |
| salt marsh | salt mining | salt pan |
| salt stress | salt water habitat | salt water intrusion |
| saltation | sample | sample sites |
| sampling airpollution | sampling instruments | sampling of particulate |
| sanctuary | sand | sand bar |
| sand core | sand drift | sand mining |
| sand-dune | sandbank | sandstone |
| sanitary landfill | sanitary sewage | sanitary sewer |
| sanitation | sanitation, food | sanitation, forest |
| sanitation, milk | saprobe | sapropel |
| saprophage | saprophyte | saprotroph |
| saprovore | sapwood | satellite |
| satellite city | satellite sounding | satiation |
| saturated air | saturation | saturation deficit |
| savanna | savanna woodland | scale |
| scale insects | scarcity | scattering |
| scavenger | scavenging | scent marking |
| schistosomiasis | schizoendemic species | school |
| science | sclerophyllous | sclerophyllus vegetation |
| scoria | scow | scramble competition |
| scrub | scrubber | scurvy |
| sea | sea breeze | sea floor spreading |
| sea fog | sea grass | sea ice |
| sea level change | sea level measurement | sea level rise |
| sea otter (enhydra lutris) | sea surface temperature | sea water distillation |
| sea weed | seafood | seafood processing |
| search image | searching | seasonal consumptive use |
| seasons | secateurs | secchi disc |
| second crop | secondary burner | secondary consumer |
| secondary energy source | secondary fermentation | secondary host |
| secondary metabolite | secondary mineral | secondary pollutant |
| secondary productivity | secondary root | secondary succession |
| secondary treatment | secondary value | secondary woodland |
| secretion | secure landfills | sedentary |
| sedge | sediment | sedimentary cycle |
| sedimentation pond | seed bank | seed dispersion |
| seed germination | seed multiplication | seed protection |
| seed technology | seed tree cutting | seep drain |
| seepage | seepage velocity | segregating effect |
| segregation | seiche | seismic survey |
| seismogram | selection | selection coefficient |
| selection pressure | selective absorber coatings | selective absorption |
| selective breeding | selective logging | selective species |
| selenium | self mulching soil | self-cleaning |
| self-diffusion | self-fertilization | self-incompatibility |
| self-pollination | self-purification | self-regulation |
| selfing | selfish behaviour | selfish genes |
| semelparity | semi-collective village | semi-desert scrub |
| semi-evergreen tropical forest | semi-natural woodland | semi-parasite |
| semi-permanent village | semi-permeable membrane | senescence |
| senescent lake | sense organs | sensible temperature |
| sentinel | sepal | septic |
| septic tank | sequestration | seral stage |
| sere | serial polygamy | sericulture |
| serule | sessile | seston |
| settling velocity | sewage | sewage farming |
| sewage fungus | sewage gas | sewage purification |
| sewage sickness | sewage sludge | sewage sludge composting |
| sewage sludge disposal | sewage treatment | sex chromosome |
| sex determination | sex ratio | sexual dimorphism |
| sexual reproduction | sexual selection | shallow soil |
| shallow subsidence | share cropping | sheep month |
| sheet composting | sheet erosion/wash | shelf-life |
| shelford’s law of tolerance | shelter wood cutting | shelter-belt |
| shield | shield volcanoes | shifting cultivation |
| shoal | shock pollution | shock waves |
| shola | shoot | short circuit |
| short wave radiation | short-day plant | shredding |
| shrimp farming | shrub | sial |
| sibling | sickle-cell disease | silage |
| silica gel | silica sand | silicate |
| silicosis | silk | silt |
| silting | silurian period | silva |
| silviculture | sima | simpson’s diversity index |
| single-celled organism | sink | sinkholes |
| sinter plant | site | site type |
| skeletal soil | slant drilling | sleep |
| slightly hygroscopic | slime mould | slope |
| slope culture | slope erosion | sludge |
| sludge processing | sludge treatment and disposal | slurry |
| smelter | smelting | smog |
| smoke | smoke control zone | smudging |
| snow avalanchs | snowline | soap |
| social behaviour | social benefit | social dominance |
| social ecology | social environment | social forestry |
| social justice | social rank | socialism |
| society | sociobiology | sociosphere |
| soda lake | sodic soil | soil |
| soil aggregate | soil air | soil analysis |
| soil association | soil classification | soil cohesion |
| soil colloid | soil colour | soil compaction |
| soil complex | soil composition | soil conditioner |
| soil conservation | soil creep | soil degradation |
| soil density | soil depth | soil drainage |
| soil erosion | soil fertility | soil genesis |
| soil geography | soil horizon | soil liner |
| soil management | soil map | soil map |
| soil maturity | soil mineral | soil moisture |
| soil morphology | soil nutrient | soil organic matter |
| soil organism | soil permeability | soil porosity |
| soil productivity | soil profile | soil salinization |
| soil scarification | soil separates | soil series |
| soil series | soil slip | soil structure |
| soil survey | soil survey | soil temperature |
| soil texture | soil water | solar cell |
| solar collector | solar constant | solar cycle |
| solar detoxification | solar device | solar drier |
| solar energy | solar energy conversion plan | solar flare |
| solar heating | solar pond | solar radiation |
| solar spectrum | solar still operation | solar thermal power system |
| solar wind | solarimeter | solid lubricant |
| solid waste | solid waste incineration | solid waste landfilling |
| solid waste management | solid waste recycling and recovery | solid waste volume reduction |
| solidification | solstice | solum |
| solution | somatic cell | somatic mutation |
| sonar | sonic | sonic boom |
| sonometer | soot | sound |
| sound level | sound level meter | sound power or acoustic power |
| sour gas | source control | source separation |
| sources of water pollution | southern oscillation | space |
| spaceship earth | spagniherbosa | spawn |
| specialist herbivore | specialization | speciation |
| species | species abundance | species based management |
| species density | species diversity | species group |
| species longevity | species population | species richness |
| species selection | species turnover | speciesism |
| specific humidity | specific retention | specific yield |
| specimen | spent fuel | sperm |
| sphenophyte | spine | spit |
| spite | splint-coal | split steam |
| spoil | sponge | spontaneous mutation |
| spore | sporophyte | sport hunting |
| spray | spray drift | spring bloom |
| spring tide | sprinkler system | sprout |
| squall | stability | stability |
| stabilization | stabilization pond | stabilizing selection |
| stable age distribution | stable equilibrium | stack |
| stack emissions | stagnant water | stakeholders |
| stall feeding | stamen | stand density |
| stand structure | standard | standing biomass |
| standing crop | starch | stasigenesis |
| stasigenesis | stasipatric speciation | stasis |
| state pollution control board | state property | static life-table |
| static reserve index | statistical method | statistics |
| steady state equilibrium | steady state theory | steam |
| stem | stem flow | stenotopic |
| steppe | sterilization | steroid |
| stigma | sting | stink gland |
| stipule | stock | stocker |
| stolon | stoma | storm beach |
| storm runoff | storm surge | strain |
| strain development | strartosphere | strategic minerals |
| strategies for ecodesign | stratimatric stratigraphy | stratovolcanoes |
| stratum | stream | stream channelization |
| stress | striation | strip cropping |
| strip grazing | strip mining | strip-farming |
| structural adjustment programme | structural trap | structure |
| stubble | stubble mulching | style |
| subalpine forest | subclimax vegetation | subdominant |
| subdominant species | subduction zone | subirrigation |
| sublimation | submerged forest | submergence marsh |
| submergent vegetation | subsidence | subsidy |
| subsistence agriculture | subsistence economy | subsistence farming |
| subsoil | subsoil water | subspecies |
| substandard seed | substitutable resource | substrate feeder |
| substratum | subtropical deserts | succession |
| succulent plant | sucker | sucrose |
| suffruiticose (suffrescent, suffrutescent) | sulfate particles | sullage water |
| sulphur | sulphur cycle | sulphur dioxide |
| sulphur pollution | sulphuric acid | sun |
| sunk cost | sunlight | sunspot |
| sunstroke | superconductivity | supercontinent |
| supercooling | superdominance | supergene |
| superheating | superorganism | superparasitism |
| supersaturation | supertanker | supply curve |
| suppressor mutation | supralittoral zone | surf |
| surface inversion | surface mining | surface water |
| surface wave | surface wind | surfactant |
| survey | survival | survival of the fittest |
| survivorship | susceptibility | suspended matter |
| sustainability | sustainable agriculture | sustainable development |
| sustainable forestry | sustainable society | sustainable tourism |
| sustainable use | sustainable yield | suture |
| swamp | swap (v) | sweet gas |
| swidden farming | swiftlet | swill |
| symbiont | symbiosis | symmetrical hybrid |
| sympatric speciation | sympatry | sympile |
| synanthrope | synapomorphy | syncline |
| syndrome | synecology | synergism |
| synfuel | syngeresis | synnecrosis |
| synonym | synoptic meteorology | synoptic observation |
| synthesis | synthesis gas | synthetic fuels |
| synthetic material | synthetic natural gas | synthetic theory |
| synusia | system | system engineering |
| systemic | systemic insecticide | systems analysis |
| systems ecology | systems theory |
| taiga | tail race | tailing |
| tailings pond | takings | talc |
| tall stacks | tangent arc | tannery waste |
| tannin | tap root | tapir |
| tar | target species | taxon |
| taxonomy | technology | technology transfer |
| technosphere | tectonic plate | telemetry |
| tellico dam | temperate forest | temperate glacier |
| temperate grassland | temperature | temperature inversion |
| tendril | tensimeter | tentacle |
| tenure | terminator technology | termite |
| terrace | terracing | terrain |
| terrestrial ecosystem | territorial water | territoriality |
| territory | tertiary consumer | tertiary period |
| tertiary treatment | tetraethyl lead | texture |
| thalamus | thallophyta | thallus report |
| the global | the ramsar convention | theory |
| theory of differentiation | theory of generic cycle | thermal cracking |
| thermal desorption | thermal efficiencey | thermal energy |
| thermal erosion | thermal gradient | thermal inversion |
| thermal plume | thermal pollution | thermal precipitation |
| thermal soaring | thermal stratification | thermocline |
| thermodynamics | thermodynamics, laws of | thermogram |
| thermograph | thermohygrograph | thermometer |
| thermophile | thermophilic digestion | thermophilic micro-organism |
| thermoplastics | thermoregulation | thermosetting polymers |
| third world | third world pollution | thorn |
| thorn forest | thorn shrub | threatened species |
| threshold dose | threshold limit value (tlv) | threshold of pain |
| threshold population density | throughfall | throughflow |
| throw away society | thrust | thunderstorm |
| tick | tidal current | tidal energy |
| tidal flat | tidal inlet | tidal power |
| tidal range | tidal stream | tides |
| till | tillage | tiller |
| tilt meter | tilth | timber |
| timber log | timberline | time period |
| time series | time zone | times beach, missouri |
| tipping fee | tissue culture | tobacco |
| toilets | tolerance | tolerance level |
| tolerance range | top predator | top soil |
| top-dressing | topgeneous mire | topography |
| toposequence | tornado and cyclone | torrey canyon |
| total cost | total economic value | total pollution loading |
| total population curve | tourism benefits | tourism impacts |
| toxic | toxic pollution | toxic substance |
| toxic waste | toxic waste management | toxicity |
| toxicology | trace element | trace fossil |
| tracer | trade and environment | trade in pollution permits |
| trade waste | trade winds | tradeable emission permit |
| traditional agriculture | tragedy of the commons | trail smelter arbitration |
| trait | trans-alaska pipeline | trans-amazonian highway |
| transboundary movement of wastes | transboundary pollution | transcription |
| transduction | transfer station | transformation |
| transfrontier pollution | transgenic organism | transgression |
| transhumance | transhumance pastoralist | translation |
| translocation | transluscent | transmission loss |
| transmutation | transparent | transpiration |
| transpire (v) | transplantation | transport and transformation |
| transported soils | trash | trawler |
| treatment of paper waste | treatment plant | treaty |
| tree | tree farm | tree line |
| tree ring | tree ring index | tree weed |
| tree, elite | tree, protected | tree, reserved |
| tremor | trench | triassic period |
| tribe | trickle irrigation | trickling filter |
| trigger factor | tritium | trochosphera (trochophore) |
| trophallaxis | trophic level | trophic structure |
| trophobiosis | trophogenic region | tropic level |
| tropical air | tropical desert vegetation | tropical grassland |
| tropical rain forest | tropical storm | tropism |
| tropopause | troposphere | trough |
| tsunami | tuber | tuff |
| tumour | tundra | tundra soil |
| tungsten | turbidite | turbidity |
| turbidity current | turbine | turgor |
| turgor pressure | turnover | turnover rate |
| turnover time | turtle excluder device (ted) | twister |
| type specimen | typhoon |
| ultimate cause | ultrapure water | ultrasound |
| ultraviolet radiation | umbelliferae | umbrella species |
| unconfined aquifer | unconformity | underflow |
| underground mine | underground stream | undergrowth |
| undernutrition | understorey | undertow |
| underwood | unequal crossing over | ungulate |
| unicellular organism | unicentric distribution | unisexual |
| univalent | universal indicator | universal solvent |
| universe | univoltine | unleaded petrol |
| unproductive forest | unsaturated flow | unsustainable development |
| upland catchment water | upstream | upwelling |
| uranium | uranium enrichment | urban contamination |
| urban ecology | urban heat island | urban renewal |
| urban sprawl | urban waste | urbanization |
| urea | urecotelic | use value |
| uses of solar heat | utilitarianism |
| vaccine | vacuole | vacuum sewer |
| vadose water | vadose zone | vagility |
| vagrant benthos | valdez principles | valley |
| valley bog | valley fog | valley wind |
| value | value capital | value devastation |
| value exploitation | value, replacement | vapour |
| vapour extraction | vapour plume | vapour pressure |
| vapour pressure deficit | vapour recovery system | vapourisation |
| variable cost | variance | variation |
| variety | varve | vascular bundle |
| vascular plant | vector | vector control |
| vegan | vegetarianism | vegetation |
| vegetation formation | vegetation index | vegetation mosaic |
| vegetation propagation | vegetation study | vegetative reproduction |
| vegetative state | vehicular pollution | veld |
| venation | vent | venturi effect |
| verfluent | verm | vermiculite |
| vernalization | vertebral column | vertebrate |
| vervical | vestigival | viability |
| vicariad | vicarious species | victims’ compensation |
| vigilance | viral vaccine | virement |
| virgin forest | virgin soil | virion |
| virology | virulence | virulent bacteria |
| virulent bacteriaphage | virulent virus | visibility |
| visible light spectrum | visual pollution | vitalism |
| viticulture | vitrification | viviparity |
| vivisection | vocalization | voice |
| volatalization | volatile | volcanic bomb |
| volcanic dust | volcanic eruption | volcanic gas |
| volcanic lake | volcanic sediment | volcano |
| volcanogenic deposits | volunteer plant | voucher specimen |
| vulcanization | vulnerable species |
| walking | wall pressure | wandering dune |
| war, environmental effect of | warm front | warm season plant |
| warner and preston study | warning colouration | warning label |
| warning signal | warping | wash |
| wasp | waste | waste anaesthetic gas |
| waste exchange | waste reduction | waste stream |
| waste treatment | waste water | waste water treatment |
| wasteland | wasteland development | wastewater discharge |
| wastewater reclamation | water act | water allocation |
| water budget | water cess act | water chemistry |
| water conservation | water cycle | water demand |
| water diversion | water environment | water erosion |
| water harvesting | water hyacinth | water injection |
| water inventory | water management | water pathway |
| water plants | water pollutant | water pollution control |
| water pollution in india | water potential | water quality standards |
| water reclamation | water resource | water right |
| water supply | water table | water table draw-down |
| water treatment | water vapour feedback | water wheel |
| water yield | water-borne disease | water-borne pathogens |
| water-power | waterholding capacity | waterlogged soil |
| waterlogging | watershed protection | waterspout |
| wateruse efficiency | wave | wave base |
| wave cyclone | wave land | wave period |
| wave power | wave size | wavelength |
| wax | weather | weather forecast |
| weather modification | weather report | weather satellite |
| weather station | weather symbol | weathering |
| weathering solution | weed | weismann’s doctrine |
| well irrigation | wells | westerlies |
| wet adiabatic instability | wet deposition | wet land |
| wet rot | wetland | wetlands |
| wetting agent | whaleback cloud | whaling |
| whirling psychometer | whirlwind | white spirit |
| whither wetlands | whorl | wide distribution |
| wild river | wild variety | wilderness |
| wilderness study area | wildfire | wildlife management |
| wildlife refuge | wildlife rehabilitation | wildlife sanctuary |
| wildtype gene | wilting | wilting point |
| wind energy | wind measurement | wind power |
| wind turbine | wind vane | wind variation |
| wind-chill | windmill | windpump |
| windrow | winds | wing |
| wing-tip vertices | winnowing | winter range |
| wise use movement | wood | wood fiber |
| wood pasture | wood pitch | world bank |