*NATURAL ENVIRONMENT* - Animals ( Animal attacks | Animal behavior | Animal experimentation | Animal feeding | Animal fighting | Animal grooming | Animal housing | Animal locomotion | Animal shelters | Animal shows | Animal tracks | Animal traps | Animal treatment | Animal welfare organizations | Camouflage (Biology) | Food | Herding | Hibernation | Hides & skins | Historic preservation | Milking | Monsters | Nature | Ranches | Stampedes | Veterinary hospitals | Veterinary medicine | Zoos ) - - Animal behavior ( Animals | Stampedes ) - - - Animal attacks ( Animals | Bites & stings ) - - - Foraging ( Confiscations | Food | Hunting ) - - - Grooming ( Manners & customs ) - - - - Animal grooming ( Animals ) - - - Imitation - - - Stampedes ( Animals | Cattle ) - - Animal tracks ( Hunting ) - - Animals in human situations - - - Animal fighting ( Animals | Sports ) - - - - Bullfighting - - - - Cockfighting ( Birds ) - - - Animal teams ( Carriages & coaches | Carts & wagons | Pack animals ) - - - - Ox teams ( Carts & wagons | Cattle ) - - - Animal training ( Trained animals ) - - - Animal treatment ( Animal experimentation | Animal shelters | Animal welfare organizations | Animals | Ethics | Wildlife conservation ) - - - Domestic animals ( Feral animals ) - - - - Dogs ( Dog licenses ) - - - - - Hunting dogs ( Hunting ) - - - - - Working dogs - - - - Donkeys ( Mules ) - - - - Livestock ( Agriculture | Animal auctions | Farms | Meat industry | Rangelands ) - - - - - Cattle ( Bison | Buffaloes | Cattle branding | Cattle herding | Cattle ranches | Dairy farming | Dairying | Ox teams | Rodeos ) - - - - - - Bulls ( Cows ) - - - - - - Cows ( Bulls ) - - - - - Swine ( Pork ) - - - - - - Boars - - - - Llamas - - - - Mules ( Donkeys | Horses ) - - - Game & game birds ( Birds | Gamekeepers | Hunting ) - - - - Deer ( Antlers | Deer hunting ) - - - - Elk ( Elk hunting | Moose ) - - - - Moose ( Elk | Moose hunting ) - - - Pack animals ( Animal teams ) - - - Pets - - - Trained animals ( Animal training | Circuses & shows ) - - - Zoo animals ( Zoos ) - - - - Elephants - - Antlers ( Deer ) - - Aquatic animals ( Amphibians | Aquariums | Sea otters | Seas | Tide pools ) - - - Aquatic invertebrates - - - Dolphins - - - Fish ( Fish hatcheries | Fish ladders | Fishing | Shellfish ) - - - - Basses (Fish) - - - - Bluefish - - - - Catfish - - - - Eels - - - - Flyingfish - - - - Halibut - - - - Pickerel - - - - Pike - - - - Sailfish - - - - Salmon - - - - Shad - - - - Sharks ( Shark fishing ) - - - - Sunfish - - - - Swordfish - - - - Trout - - - - Tuna - - - Fishes - - - - Anadromous fishes - - - - Exotic fishes - - - - Freshwater fishes - - - - Intertidal fishes - - - - Introduced fishes - - - - Marine fishes - - - Jellyfishes - - - Octopuses - - - Shellfish ( Fish | Shellfish industry | Shrimp industry ) - - - - Clams - - - - Lobsters - - - - Oysters ( Oystering ) - - - Squids - - - Whales ( Whaling ) - - Birds ( Aviaries | Bird watching | Birdhouses | Birds' eggs & nests | Cockfighting | Extinct birds | Feathers | Game & game birds | Game bird hunting ) - - - Birds of prey - - - - Eagles - - - - Falcons ( Falconry ) - - - - Hawks - - - - Ospreys - - - - Owls - - - Birds' eggs & nests - - - Coots - - - Cranes (Birds) - - - Crows - - - Ducks ( Duck shooting | Poultry ) - - - Feathers ( Decorations ) - - - Geese ( Goose shooting | Poultry ) - - - Grouse - - - Gulls - - - Herons - - - Hummingbirds - - - Ibis - - - Introduced birds - - - Kingfishers - - - Loons - - - Magpies - - - Ostriches - - - Partridges ( Quails ) - - - Passeriformes - - - Pelicans - - - Pheasants ( Pheasant shooting ) - - - Pigeons - - - Poultry ( Ducks | Geese | Poultry houses | Turkeys ) - - - - Chickens ( Chicken industry ) - - - - - Roosters - - - Prairie hens ( Prairie hen shooting ) - - - Quails ( Partridges | Quail shooting ) - - - Ravens - - - Robins - - - Starlings - - - Storks - - - Swallows - - - Swans - - - Titmice - - - Turkeys ( Poultry ) - - - Vultures - - - Waterfowl - - - Woodcocks - - - Woodpeckers - - Bones ( Skeletons ) - - - Skeletons ( Bones | Dead animals | Dead persons ) - - Cats - - Chordata - - Dead animals ( Death | Hunting | Hunting trophies | Skeletons | Taxidermy ) - - Endemic animals - - Exotic animals - - - Exotic fishes - - Extinct animals ( Paleontology | Wildlife conservation ) - - - Dinosaurs - - - Extinct birds ( Birds ) - - - Mammoths - - Feral animals ( Domestic animals ) - - Herbivores - - - Antelopes ( Antelope hunting ) - - - Deer ( Antlers | Deer hunting ) - - Invertebrates - - - Aquatic invertebrates - - - Arthropoda - - - - Arachnida - - - - Crustacea - - - - Insects ( Bites & stings | Entomology | Pest control | Plant parasites ) - - - - - Ants - - - - - Bees ( Bee culture | Beehives ) - - - - - Butterflies - - - - - Dragonflies - - - - - Flies - - - - - Grasshoppers - - - - - Insect societies - - - - - - Wasps' nests - - - - - Mosquitos - - - - - Spiders - - - - - Termites - - - - - Wasps ( Wasps' nests ) - - - Brachiopoda - - - Bryozoa - - - Cryptozoa - - - Ctenophora - - - Echinodermata - - - Hemichordata - - - Mollusks - - - - Bivalvia - - - Myxozoa - - - Onychophora - - - Protozoa ( Protozoology ) - - - Soil invertebrates - - - Sponges - - - Worms - - Teeth - - - Tusks - - Tide pool animals - - Vertebrates ( Chordata ) - - - Amphibians ( Aquatic animals | Herpetology ) - - - - Anura - - - - - Frogs - - - - - Toads - - - - Frogs - - - - Salamanders - - - - Toads - - - Birds ... - - - Fishes ... - - - Mammals - - - - Anteaters - - - - Antelopes ( Antelope hunting ) - - - - Artiodactyla - - - - - Bovidae - - - - - Cervidae - - - - - Suidae - - - - Badgers - - - - Bats - - - - Bears ( Bear hunting ) - - - - - Grizzly bears - - - - Bison ( Bison hunting | Buffaloes | Cattle ) - - - - Buffaloes ( Bison | Cattle ) - - - - Carnivora - - - - - Bears ... - - - - - Canidae - - - - - - Canis - - - - - - Coyotes ( Coyote hunting ) - - - - - - Dogs ... - - - - - - Foxes ( Fox hunting ) - - - - - - Wolves ( Wolf hunting ) - - - - - Felidae - - - - - Mustelidae - - - - Cats - - - - Cetacea - - - - - Porpoises - - - - - Whales ( Whaling ) - - - - Deer ( Antlers | Deer hunting ) - - - - Elk ( Elk hunting | Moose ) - - - - Fur-bearing animals - - - - Goats ( Dairying ) - - - - - Mountain goats ( Mountain goat hunting ) - - - - Horses ( Horse farms | Horse herding | Horse railroads | Horseback riding | Mules | Rodeos | Stables ) - - - - Insectivora - - - - - Moles (Animals) - - - - - Shrews - - - - Lagomorpha - - - - Lynx ( Lynx hunting ) - - - - Marsupialia - - - - Moles (Animals) - - - - Moose ( Elk | Moose hunting ) - - - - Muskox - - - - Opossums ( Opossum hunting ) - - - - Otters - - - - - Sea otters ( Aquatic animals ) - - - - Panthers ( Pumas ) - - - - Perissodactyla - - - - - Equidae - - - - Pumas ( Panthers | Puma hunting ) - - - - Raccoons ( Raccoon hunting ) - - - - Rare mammals - - - - Rodents ( Rodent control ) - - - - - Beavers - - - - - Chipmunks - - - - - Gophers - - - - - Kangaroo rats - - - - - Marmots - - - - - Mice - - - - - - Pocket mice - - - - - Pikas - - - - - Pocket gophers - - - - - Porcupines - - - - - Prairie dogs - - - - - Rabbits ( Rabbit hunting ) - - - - - Rats - - - - - Sciuridae - - - - - - Chipmunks - - - - - - Marmots - - - - - - Squirrels - - - - - - Woodchucks - - - - - Wood rats - - - - Seals (Animals) - - - - - Sea lions - - - - Sheep ( Sheep ranches ) - - - - - Mountain sheep ( Mountain sheep hunting ) - - - - Voles - - - - Weasels ( Wolverines ) - - - - Wolverines ( Weasels ) - - - Reptiles ( Herpetology ) - - - - Lizards - - - - Snakes ( Snake dance ) - - - - Squamata - - - - - Lizards - - - - - Snakes ( Snake dance ) - - - - Turtles - - - - - Sea turtles - atmosphere ( Meteorology ) - - air ( Air quality management ) - - - atmospheric components - - - atmospheric composition - - - atmospheric ozone - - - tropospheric ozone - - atmospheric processes - - - air movement - - - air-water interaction - - - atmospheric circulation - - - ocean-air interface - - atmospheric structure - - - atmospheric layering - - - boundary layer - - - inversion layer - - - ionosphere - - - ozone layer - - - stratosphere - - - troposphere - - climate - - - climate types - - - - continental climate - - - - desert climate - - - - equatorial climate - - - - Mediterranean climate - - - - microclimate - - - - mountain climate - - - - oceanic climate - - - - temperate climate - - - - tropical climate - - - climatic change - - - - climate effects - - - El Nino Current - - - meteorological phenomena - - - - air temperature - - - - atmospheric precipitation - - - - cloud - - - - cyclones ( Hurricanes | Tornadoes ) - - - - drought - - - - fog ( Fog control ) - - - - glaze - - - - hail ( Storms ) - - - - haze - - - - mist - - - - precipitation (meteorological) - - - - rain ( Droughts | Rain making | Storms ) - - - - snow ( Avalanches | Blizzards | Ice | Skiing | Snow removal | Snowshoeing | Winter ) - - - - storm - - - - thunderstorm - - - - tornado - - - - white frost - - - - wind - - - Waterspouts ( Tornadoes ) - - - weather ( Barometers | Weather control ) - - - - Droughts ( Rain | Scarcity | Water supply ) - - - - Fire weather ( Forest fires ) - - - - Fog ( Fog control ) - - - - Fronts (Meteorology) - - - - Hail ( Storms ) - - - - Precipitation (Meteorology) - - - - - Rain and rainfall - - - - - Snow ( Avalanches | Blizzards | Ice | Skiing | Snow removal | Snowshoeing | Winter ) - - - - precipitation enhancement - - - - Rain ( Droughts | Rain making | Storms ) - - - - Snow ( Avalanches | Blizzards | Ice | Skiing | Snow removal | Snowshoeing | Winter ) - - - - Storms ( Disasters | Floods | Hail | Lightning | Rain | Winds ) - - - - - Blizzards ( Snow ) - - - - - Cyclones ( Hurricanes | Tornadoes ) - - - - - Dust storms ( Erosion ) - - - - - Hurricanes ( Cyclones | Tornadoes | Typhoons ) - - - - - Tornadoes ( Cyclones | Hurricanes | Waterspouts ) - - - - - Typhoons ( Hurricanes ) - - - - weather conditions - - - - weather modification - - - - Winds ( Storms ) - - Earth-Sun relationships - - - duration of sunshine - - - season - - - solar radiation - - Hydrogen - - Weather ( Barometers | Weather control ) - - - Droughts ( Rain | Scarcity | Water supply ) - - - Fire weather ( Forest fires ) - - - Fog ( Fog control ) - - - Fronts (Meteorology) - - - Hail ( Storms ) - - - Precipitation (Meteorology) ... - - - precipitation enhancement - - - Rain ( Droughts | Rain making | Storms ) - - - Snow ( Avalanches | Blizzards | Ice | Skiing | Snow removal | Snowshoeing | Winter ) - - - Storms ... - - - weather conditions - - - weather modification - - - Winds ( Storms ) - biochemical processes - - biodegradation - - - biodegradability - - interaction of pesticides - - nitrogen fixation - - persistence of pesticides - Biomass ( Biology ) - - Forest biomass - - Plant biomass - biosphere - - anatomy ( Physiology ) - - - alveolus - - - antibody - - - blood - - - cardiovascular system - - - cell - - - DNA - - - endocrine system - - - flower - - - foliage - - - genes - - - genetic information - - - germ plasm - - - hearing system - - - immune system - - - leaf - - - lymphatic system - - - membrane - - - muscular system - - - nervous system - - - organ - - - plant components - - - pollen - - - respiratory system - - - respiratory tract - - - root - - - skin - - - stock (biological) - - - tissue - - biological processes - - - age - - - animal biology - - - animal physiology - - - animal reproduction - - - assimilation - - - biological cycle - - - biological development - - - bioluminescence - - - biorythm - - - biosynthesis - - - brooding - - - cycle (phenomenon) - - - differentiation - - - egg - - - embryo - - - embryogenesis - - - evapotranspiration - - - germination - - - hearing (sense) - - - hearing acuity - - - hybridization - - - life cycle - - - metabolism - - - metabolite - - - mineralization - - - mutants - - - mutation - - - ontogenesis - - - photosynthesis - - - plant biology - - - plant life - - - plant physiology - - - plant reproduction - - - reproduction ( Embryology ) - - - - Eggs ( Birds' eggs & nests | Embryology ) - - - - Fertility - - - - Sex ( Interpersonal relations ) - - - - Spawning - - - - Spermatozoa - - - respiration - - - respiratory air - - - seed - - - sleep - - - water balance (biological) - - ecosystem - - - abiotic factors - - - adaptation - - - animal behaviour - - - animal habitat - - - animal life - - - animal population - - - animal species - - - animal territory - - - aquatic ecosystem - - - arboretum - - - area - - - autoecology - - - beaching - - - behaviour - - - behaviour patterns - - - bio-availability - - - bioaccumulation - - - biocoenosis - - - biodiversity - - - biogeochemical cycles - - - biological attributes - - - biological diversity ( Ecological heterogeneity ) - - - - Plant diversity - - - - Species diversity - - - biological production - - - biomass ( Biology ) - - - - Forest biomass - - - - Plant biomass - - - biosystem - - - biotic factor - - - biotope - - - biotope networks - - - carrying capacity - - - climax - - - coastal ecosystems - - - colonisation - - - competition (biological) - - - ecological abundance - - - ecological adaptations - - - ecological balance - - - ecological community - - - ecological factor - - - ecological load capacity - - - ecological niche - - - ecosystem type - - - ecotype - - - ecozone - - - endemic species - - - extinction (ecological) - - - food chain - - - forest ecosystems - - - fouling growth - - - freshwater ecosystems - - - genetic diversity - - - genetic pool - - - genetic variation - - - geogenic factor - - - habitat - - - herbivore - - - imitative fauna - - - imitative flora - - - internationally important ecosystems - - - island ecosystems - - - marine ecosystems - - - material balance - - - microecosystem - - - migration (animal) - - - natural regeneration - - - nesting - - - nesting area - - - nitrogen cycle - - - nutrient balance - - - nutrient cycle - - - nutrients - - - overturn (limnology) - - - overwintering - - - phytomass - - - plant community - - - plant population - - - plant species - - - population (ecological) - - - population dynamics - - - resistance - - - resting form - - - running wild - - - saprobe - - - sea grass bed - - - secondary biotope - - - shelter - - - specialisation (biological) - - - species - - - survival - - - symbiosis - - - - Mycorrhizas - - - synecology - - - terrestrial ecosystem - - - territory - - - trophic level - - - urban ecosystems - - - vegetation - - - vegetation cover - - - vegetation level - - - wetlands ecosystems - - evolution ( Adaptation (Biology) | Biology | Civilization | Creation ) - - - fossil - - organisms - - - algae ( Algology ) - - - - Microalgae - - - Amphibia - - - Anatidae - - - angiosperms - - - - Dicotyledons - - - - Monocotyledons - - - animals (taxonomy) - - - annelids - - - arthropods - - - articulata - - - bacteria ( Diseases | Microorganisms ) - - - bat - - - bees ( Bee culture | Beehives ) - - - beetles - - - bird species - - - birds ( Aviaries | Bird watching | Birdhouses | Birds' eggs & nests | Cockfighting | Extinct birds | Feathers | Game & game birds | Game bird hunting ) - - - - Birds of prey ... - - - - Birds' eggs & nests - - - - Coots - - - - Cranes (Birds) - - - - Crows - - - - Ducks ( Duck shooting | Poultry ) - - - - Feathers ( Decorations ) - - - - Geese ( Goose shooting | Poultry ) - - - - Grouse - - - - Gulls - - - - Herons - - - - Hummingbirds - - - - Ibis - - - - Introduced birds - - - - Kingfishers - - - - Loons - - - - Magpies - - - - Ostriches - - - - Partridges ( Quails ) - - - - Passeriformes - - - - Pelicans - - - - Pheasants ( Pheasant shooting ) - - - - Pigeons - - - - Poultry ... - - - - Prairie hens ( Prairie hen shooting ) - - - - Quails ( Partridges | Quail shooting ) - - - - Ravens - - - - Robins - - - - Starlings - - - - Storks - - - - Swallows - - - - Swans - - - - Titmice - - - - Turkeys ( Poultry ) - - - - Vultures - - - - Waterfowl - - - - Woodcocks - - - - Woodpeckers - - - blue-green algae - - - bovids - - - bryophytes - - - - Mosses - - - bugs - - - butterflies - - - carnivores - - - cephalopods - - - cetaceans - - - Chelicerata - - - chestnut - - - chiropterans - - - Chrysophyta - - - cockroaches - - - coelenterates - - - coliform bacteria - - - colubrids - - - conifer - - - coral - - - Cordata - - - crocodiles - - - crustaceans - - - cryptogams - - - - Bryophytes - - - - - Mosses - - - - Ferns - - - - Fungi ( Mycology ) - - - - - Mushrooms - - - - Lichens - - - - Pteridophyta - - - - - Ferns - - - Cyanophyta - - - deer ( Antlers | Deer hunting ) - - - diatoms - - - dipterous - - - dragonflies - - - earthworms - - - earwigs - - - echinoderms - - - equines - - - faecal bacteria - - - felid - - - ferns - - - fish ( Fish hatcheries | Fish ladders | Fishing | Shellfish ) - - - - Basses (Fish) - - - - Bluefish - - - - Catfish - - - - Eels - - - - Flyingfish - - - - Halibut - - - - Pickerel - - - - Pike - - - - Sailfish - - - - Salmon - - - - Shad - - - - Sharks ( Shark fishing ) - - - - Sunfish - - - - Swordfish - - - - Trout - - - - Tuna - - - fleas - - - flowering plants - - - frogs - - - gallinaceans - - - gastropod - - - grasses ( Grasslands | Meadows | Pastures ) - - - grasshoppers - - - gymnosperms - - - - Conifers - - - - - Cupressaceae - - - - - Pinaceae - - - - - Softwood - - - - - Taxodiaceae - - - higher plants - - - Hymenoptera - - - insectivores - - - insects ( Bites & stings | Entomology | Pest control | Plant parasites ) - - - - Ants - - - - Bees ( Bee culture | Beehives ) - - - - Butterflies - - - - Dragonflies - - - - Flies - - - - Grasshoppers - - - - Insect societies ... - - - - Mosquitos - - - - Spiders - - - - Termites - - - - Wasps ( Wasps' nests ) - - - lichens - - - lizards - - - mammals - - - - Anteaters - - - - Antelopes ( Antelope hunting ) - - - - Artiodactyla ... - - - - Badgers - - - - Bats - - - - Bears ... - - - - Bison ( Bison hunting | Buffaloes | Cattle ) - - - - Buffaloes ( Bison | Cattle ) - - - - Carnivora ... - - - - Cats - - - - Cetacea ... - - - - Deer ( Antlers | Deer hunting ) - - - - Elk ( Elk hunting | Moose ) - - - - Fur-bearing animals - - - - Goats ... - - - - Horses ( Horse farms | Horse herding | Horse railroads | Horseback riding | Mules | Rodeos | Stables ) - - - - Insectivora ... - - - - Lagomorpha - - - - Lynx ( Lynx hunting ) - - - - Marsupialia - - - - Moles (Animals) - - - - Moose ( Elk | Moose hunting ) - - - - Muskox - - - - Opossums ( Opossum hunting ) - - - - Otters ... - - - - Panthers ( Pumas ) - - - - Perissodactyla ... - - - - Pumas ( Panthers | Puma hunting ) - - - - Raccoons ( Raccoon hunting ) - - - - Rare mammals - - - - Rodents ... - - - - Seals (Animals) ... - - - - Sheep ... - - - - Voles - - - - Weasels ( Wolverines ) - - - - Wolverines ( Weasels ) - - - marsupials - - - mites - - - molluscs - - - mosses - - - mustelids - - - mycetes - - - nematodes - - - oaks - - - Orthoptera - - - ovid - - - phanerogams - - - pinnipeds - - - plantigrade - - - plants (taxonomy) - - - poriferans - - - posidonia - - - primates - - - proboscideans - - - Procaryota - - - protozoan - - - rape (plant) - - - reed - - - reptiles ( Herpetology ) - - - - Lizards - - - - Snakes ( Snake dance ) - - - - Squamata ... - - - - Turtles ... - - - rice ( Rice industry | Rice plantations ) - - - rodents ( Rodent control ) - - - - Beavers - - - - Chipmunks - - - - Gophers - - - - Kangaroo rats - - - - Marmots - - - - Mice ... - - - - Pikas - - - - Pocket gophers - - - - Porcupines - - - - Prairie dogs - - - - Rabbits ( Rabbit hunting ) - - - - Rats - - - - Sciuridae ... - - - - Wood rats - - - salamanders - - - salmonella - - - seed plants - - - snakes ( Snake dance ) - - - spiders - - - termites - - - toads - - - tortoises - - - Tracheophyta - - - ungulates - - - unicellular animals - - - vertebrates ( Chordata ) - - - - Amphibians ... - - - - Birds ... - - - - Fishes ... - - - - Mammals ... - - - - Reptiles ... - - - viruses - - - water fleas - - - water hyacinth - - - whale - - organisms (not systematic) - - - agricultural pests - - - animals (not systematic) - - - aquatic animal - - - aquatic organisms - - - aquatic plants - - - avifauna - - - beef cattle - - - benthos - - - big game - - - birds (not systematic) - - - birds of prey - - - - Eagles - - - - Falcons ( Falconry ) - - - - Hawks - - - - Ospreys - - - - Owls - - - breeding birds - - - broad-leaved tree - - - cattle ( Bison | Buffaloes | Cattle branding | Cattle herding | Cattle ranches | Dairy farming | Dairying | Ox teams | Rodeos ) - - - - Bulls ( Cows ) - - - - Cows ( Bulls ) - - - climbing plants (wall) - - - cultivated plant - - - deciduous tree - - - dog - - - domesticated animals - - - endangered animal - - - exotic species - - - farm animal - - - fauna - - - flora - - - fodder plant - - - forest pest - - - freshwater organisms - - - fruit tree - - - fur animal - - - game (animals) - - - graminaceous plant - - - horse - - - industrial plant - - - invertebrates - - - - Aquatic invertebrates - - - - Arthropoda ... - - - - Brachiopoda - - - - Bryozoa - - - - Cryptozoa - - - - Ctenophora - - - - Echinodermata - - - - Hemichordata - - - - Mollusks ... - - - - Myxozoa - - - - Onychophora - - - - Protozoa ( Protozoology ) - - - - Soil invertebrates - - - - Sponges - - - - Worms - - - laboratory animal - - - livestock ( Agriculture | Animal auctions | Farms | Meat industry | Rangelands ) - - - - Cattle ... - - - - Swine ... - - - macrophyte - - - mangroves - - - marine fauna - - - marine mammal - - - marine organisms - - - medicinal plants ( Herbs ) - - - microorganisms ( Bacteria ) - - - - Bacteria ( Diseases | Microorganisms ) - - - - Photosynthetic bacteria - - - - Plant parasites ( Biological pest control | Insects | Plants ) - - - - Viruses - - - migratory birds - - - migratory fish - - - mushrooms - - - mycorrhiza - - - non-target organism - - - parasite - - - pathogenic organisms - - - periphyton - - - pest - - - pet - - - phytoplankton - - - plankton - - - plant environment - - - plants (biology) - - - plants (not systematic) - - - poultry ( Ducks | Geese | Poultry houses | Turkeys ) - - - - Chickens ... - - - predators - - - resinous plant - - - saprophyte - - - soil organisms - - - songbirds - - - test animal - - - test organism - - - textile plant - - - tree - - - tropical plant - - - useful organism - - - vermin - - - warm-blooded animal - - - waterfowl - - - wild animals - - - wild fauna - - - wild plants - - - wildlife - - - windblown trees - Bodies of water ( Beaches | Floods | Hydraulic facilities | Land | Nature | Oases | Water pollution | Waterfronts | Wetlands ) - - Basins (Bodies of water) - - Bays ( Harbors | Seas ) - - Channels ( Streams ) - - Harbors ( Bays | Jetties | Marine terminals | Piers & wharves | Ships | Waterfronts ) - - - Breakwaters - - - Docks - - - Marinas - - - Marine terminals ( Ferries | Harbors | Piers & wharves | Shipping | Vessels ) - - - Piers - - - Port districts - - - Wharves - - Lakes & ponds ( Reservoirs ) - - - Lily ponds ( Water gardens | Water lilies ) - - - Water holes ( Oases ) - - Seas ( Aquatic animals | Bays | Oceanography | Reefs | Sandbars | Tidal waves | Tide pools ) - - - Oceans - - Springs ( Geysers | Mineral waters | Therapeutic baths ) - - Streams ( Arroyos | Channels | Fish ladders | Fords (Stream crossings) | Sandbars | Waterfalls ) - - - Fords (Stream crossings) ( Streams | Transportation ) - - - Rivers ( Deltas | Portages | Rapids | Valleys ) - - Territorial waters ( International relations ) - - Tide pools ( Aquatic animals | Seas | Waterfronts ) - - Waterfalls ( Streams ) - Cells (Biology) - chemical process - - chemical reactions - - - acidification - - - addition - - - ammonification - - - catalysis - - - chemisorption - - - chlorination - - - complex formation - - - denitrification (soil, water) - - - fluoridation - - - hydrolysis - - - neutralization - - - nitrification - - - oxidation - - - oxidation-reduction - - - ozonisation - - - photochemical agents - - - photochemical oxidants - - - photochemical reactions - - - photolysis - - - polymerization - - - reaction kinetics - - - reduction - - etching - - removal - - - desulphurization - - - nitrogen removal - - - phosphate removal - - replacement - - - substitution of halogenated compounds - - softening - chemical properties - - acids - - - diluted acid - - aerobic - - amalgam - - anaerobic - - antagonism - - bases - - biochemical oxygen demand - - - BOD - - chemical composition - - chemical corrosivity - - chemical oxygen demand - - - COD - - chemical refuse - - chemical structures - - concentration - - - acidity - - - acidity degree - - - aluminium content - - - basicity - - - calcium content - - - dissolved oxygen - - - lime-deficient - - - lime-rich - - - nutrient content - - - nutrient-deficient - - - nutrient-rich - - - oxygen content - - - oxygen-deficiency - - - oxygen-rich - - - pH - - - pH-value - - - salt content - - - strong acidity - - - sulphur concentration - - - water hardness - - - water salinity - - dose-effect relationship - - faintly degradable substance - - heavy metal - - inorganic compounds - - insoluble substance - - ions - - - anions - - - cations - - isomer - - isotope - - lipophilic substance - - metals ( Metallurgical industry | Ore industry ) - - - Aluminum ( Aluminum industry ) - - - Gold ( Money ) - - - Precious metals - - - Silver ( Money | Silver mining ) - - - Steel ( Steel industry ) - - non volatile substance - - non-metals - - nutrient medium - - organic carbon - - - dissolved organic carbon - - - TOC - - - total organic carbon - - organic compounds - - - aliphatic compounds - - - alkyl compound - - - aromatic compounds - - - functional substances - - - halogenated compound - - - organophosphorus compound - - - volatile organic compounds - - organic nitrogen - - organoleptic property - - oxides - - phosphate substitute - - radioelement - - salts - - semi-metal - - structure-activity relationship - - substitutability - - synergism - - trace elements - - volatile substance - chemical substances - - biochemical substances - - - amino acids - - - carbohydrates - - - chlorophyll - - - enzyme - - - lipids - - - nucleic acids - - - protein - - - starch - - - steroids - - - vitamins - - inorganic substances - - - actinides - - - actinium - - - aluminium - - - ammonia - - - ammonium - - - arsenic - - - barium - - - beryllium - - - boron - - - bromine - - - cadmium - - - caesium - - - calcium - - - carbon - - - carbon dioxide - - - carbon monoxide - - - carbonate - - - chloride - - - chlorine - - - chromium - - - cobalt - - - copper - - - cyanide - - - elements of group 0 (noble gases) - - - elements of group I (alkaline) - - - elements of group II (alkaline earth metals) - - - elements of group III - - - elements of group IV - - - elements of group V - - - elements of group VI - - - elements of group VII (halogens) - - - fluorine - - - halogens - - - hydrogen - - - hydrogen chloride - - - hydrogen sulphide - - - iodine - - - iron - - - lead - - - lead compound - - - mercury - - - nickel - - - nitrate - - - nitrogen - - - nitrogen dioxide - - - nitrogen monoxide - - - nitrogen oxides - - - nitrous oxide - - - noble gases - - - oxygen - - - ozone - - - phosphate - - - phosphorus - - - platinum - - - plutonium - - - radon - - - selenium - - - silicon - - - silver ( Money | Silver mining ) - - - strontium - - - sulphur - - - sulphur dioxide - - - sulphur monoxide - - - sulphur oxides - - - thallium - - - tin (element) - - - titanium - - - titanium dioxide - - - transition elements - - - tritium - - - uranium - - - vanadium - - - zinc - - organic substances - - - alcohols - - - alicyclic hydrocarbons - - - aliphatic hydrocarbons - - - alkanes - - - amine - - - aromatic hydrocarbons - - - atrazine - - - benzene - - - benzopyrene - - - chlorinated hydrocarbons - - - chloroethylenes - - - chlorofluorocarbon compounds - - - chlorofluorocarbons - - - chlorofluorohydrocarbons - - - chlorophenols - - - cyanate - - - dioxins - - - ethanol - - - ethers - - - freons - - - furans - - - halogenated biphenyls - - - halogenated hydrocarbons - - - halogenated phenols - - - heterocyclic compounds - - - hydrocarbons - - - methane - - - nitro compounds - - - nitrosamine - - - organochlorine compounds - - - organohalogen compounds - - - organometallic compounds - - - organonitrogen compounds - - - organooxygen compounds - - - organophosphorous compounds - - - organosulfur compounds - - - organotin compounds - - - PAH - - - PCB - - - pentachlorophenol - - - perchloroethylene - - - peroxyacetylnitrate - - - phenols - - - polychlorinated biphenyls - - - polychlorinated dibenzodioxin - - - polychlorinated dibenzofurans - - - polycyclic aromatic hydrocarbon - - - polycyclic hydrocarbons - - - polymers - - - purin - - - pyralene - - - triazines - Chemicals ( Chemical industry | Chemistry | Pest control ) - - activated carbon - - additive - - adhesive - - agrochemicals - - algicide - - antifouling - - artificial fertilizer - - bactericide - - biocide - - bleaching agent - - bleaching clay - - chemical fertilizers - - chemical warfare agent - - complexing agent - - conservants - - control agent - - corrosion inhibitor - - DDT - - disinfectant - - dye - - etching substances - - fire-proofing agent - - flocculants - - foaming agent - - fuel additive - - fungicide - - glue - - haloform - - herbicide - - household chemicals - - impregnating agent - - ink - - inorganic fertilizer - - insecticide - - lye - - Nitrates - - nitrogenous fertiliser - - oil binding agent - - organic fertiliser - - organic solvents - - oxidizing agent - - pesticide - - Pesticides ( Pest control ) - - - Acaricides - - - Algicides - - - Fumigants - - - Fungicides - - - Herbicides - - - Insecticides - - - Molluscicides - - petrochemicals - - phosphatic fertiliser - - photochemical products - - Photosynthetic pigments - - phytopharmaceutical product - - plant protection product - - plant-health products - - potassium fertiliser - - preservative - - propellant - - refrigerant - - road salt - - seed dressing - - softening agent - - special chemicals - - surfactants - Climate - - climate types ... - - climatic change ... - - El Nino Current - - meteorological phenomena ... - - Waterspouts ( Tornadoes ) - - weather ... - Coasts - - Bays ( Harbors | Seas ) - Courtship of animals - Creation ( Civilization | Evolution | Human life cycle | Inventions ) - Curiosities & wonders - Diseases ( Allergies | Bacteria | Health ) - - Allergies ( Diseases ) - - Cancer - - Communicable diseases ( Quarantines | Vaccinations ) - - - Cholera - - - Rabies - - - Tuberculosis - Dormancy (Biology) - - Hibernation ( Animals | Winter ) - Earth - - Atmosphere ( Meteorology ) - - - air ... - - - atmospheric processes ... - - - atmospheric structure ... - - - climate ... - - - Earth-Sun relationships ... - - - Hydrogen - - - Weather ... - - Biosphere - - - anatomy ... - - - biological processes ... - - - ecosystem ... - - - evolution ... - - - organisms ... - - - organisms (not systematic) ... - Ecological succession - Endangered species ( Wildlife conservation ) - Environmental quality ( Environmental degradation | Environmental protection | Pollution ) - - air quality ( Ecology | Pollution ) - - groundwater quality - - quality of waters - - soil quality - - waste water quality - - water quality - Evolution ( Adaptation (Biology) | Biology | Civilization | Creation ) - - fossil - Fires ( Arson | Disasters | Fire | Fire engines & equipment | Fire escapes | Fire fighters | Fire fighting | Fire lookout stations | Fire prevention | Fire-resistive construction | Firebreaks ) - - Forest fires ( Fire weather ) - - Grassland fires - Fisheries ( Fishes ) - - by-catch - - catch-yield - - commercial fishery - - fish stock - - fisheries structure - - Fishery technology - - fishing grounds - - inland fisheries - - marine fisheries - - - coastal fishing - - - deep sea fishing - - - drift-net fishing - - - open sea fishing - - - whaling ( Fishing industry | Whales ) - - overfishing - - trapping - GENERAL TERMS (natural environment, anthropic environment) - - abiotic environment - - aquatic environment - - balance - - balance of nature - - environment - - geophysical environment - - nature ( Animals | Bodies of water | Ecology | Land | Natural phenomena | Plants ) - - sensitive environment - - state of the environment - - terrestrial environment - geological processes - - morphogenesis - - rising (geological) - - - land sinking - - - subsidence - - sedimentation - - seismic activity - - - bradyseism - - - earthquake - - volcanism - - - volcanic eruption - Glacial landforms - Global warming - Greenhouse gases - Growth (Plants) - Habitats - - Grasslands ( Grasses ) - - - Prairies - - - Rangelands ( Livestock | Meadows ) - - - - Grazing districts - - - - Range policy - - - Savannas - - - Steppes - - Meadows ( Croplands | Grasses | Grazing | Pastures ) - - Sand dunes - - Serpentine - - Tidal flats - - Tide pools ( Aquatic animals | Seas | Waterfronts ) - - Wetlands ( Bodies of water | Reclamation of land ) - - - Bogs - - - Fens - - - Forested wetlands - - - Marshes - - - Moors and heaths - - - Riparian areas - - - Swamps - - - Tidal flats - Health ( Diseases | Health care | Physical fitness | Safety | Sanitation ) - - animal health - - environmental health ( Environmental engineering | Health risk assessment ) - - health care ( Examinations | First aid | Health | Health care facilities | Health education | Institutional care | Medicine | Therapeutic baths ) - - - acoustic comfort - - - artificial reproductive techniques - - - clinical symptoms - - - detoxification - - - drawing - - - Emergency medical services ( Ambulances | Disaster relief | Emergency rooms | First aid | Victims | Wounds & injuries ) - - - environmental health protection - - - First aid ( Emergency medical services | Health care ) - - - medical treatment - - - occupational health - - - occupational health care - - - phytopathology - - - preventive health measures - - - prognostic data - - - Quarantines ( Communicable diseases ) - - - smoke prevention - - - therapy - - - Vaccinations ( Communicable diseases | Medicines ) - - - Wounds & injuries ( Accidents | Emergency medical services | Victims ) - - - - Bites & stings ( Animal attacks | Insects ) - - human health - - medicine ( Health care | Medical equipment & supplies | Medicines ) - - - environmental medicine - - - health care profession - - - industrial medicine - - - - occupational medicine - - - social medicine - - - Surgery - - - traditional health care - - - veterinary medicine ( Animals | Veterinary hospitals ) - - nutrition - - - animal nutrition - - - applied nutrition - - - - adequate food supplies - - - - basic food requirements - - - - food requirements - - - - malnutrition - - - staple foods - - - - food contamination - - - - food hygiene - - - - food quality - - Physical fitness ( Health | Sports ) - - public health - - - Community health services - - - - Clinics ( Medical offices ) - - - disinfection - - - Environmental health ( Environmental engineering | Health risk assessment ) - - - Epidemiology - - - - Epidemics - - - Health boards - - - Health facilities - - - - Ambulances - - - - Clinics ( Medical offices ) - - - - Halfway houses - - - - Long-term care facilities - - - - Medical centers ( Hospitals ) - - - - Medical laboratories - - - - Medical offices ( Clinics ) - - - - Mental health facilities - - - - Mental retardation facilities - - - - Poison control centers - - - - Rehabilitation centers - - - - - Halfway houses - - - - Religious health facilities - - - - Subacute care facilities - - - - Vaccination centers - - - Health planning - - - - Health service areas - - - Health risk assessment ( Environmental health ) - - - hygiene - - - Mental health - - - Regional medical programs - - - - Community health services ... - - - Sanitary districts - - - sanitation ( Health | Pollution ) - - - - Cleaning - - - - - Refuse disposal ( Junkyards | Radioactive wastes | Recycling | Refuse | Sewerage | Urban beautification | Waste disposal facilities ) - - - - - - Ash disposal - - - - - - Garbage collecting - - - - - Snow removal ( Snow ) - - - - Refuse disposal ... - - - - Sewerage ( Refuse disposal | Septic tanks | Sewers | Waste disposal facilities ) - - - - - Combined sewers - - - - - Manholes - - - - - Sewage - - - - - Storm sewers - - - School hygiene - - - teratogenesis screening - - Tobacco habit ( Smoking | Tobacco | Tobacco products ) - hydrosphere - - groundwater - - - alluvial sheet - - - aquifer - - - water bodies - - hydrologic cycle - - - discharge regime - - - drainage - - - drainage system - - - flood - - - flood runoff - - - flooding - - - flow - - - hydrographic network - - - hydrologic balance - - - hydrologic flow - - - infiltration - - - inflow - - - low water - - - ocean circulation - - - residual amount of water - - - rinsing - - - rising sea level - - - runoff - - - sea circulation - - - sea level - - - seepage - - - seismic sea waves - - - subsoil drainage - - - surface runoff - - - swell - - - tides - - - water balance - - - water bottom - - - water infiltration into the ground - - - water level - - sea - - - deep sea - - - ocean ( Oceanography ) - - - open sea - - water course - - - brook - - - creek - - - deltas ( Rivers ) - - - estuary - - - river - - - spring (waters) - - - waterfall - - water reservoir - - - fen - - - lakes - - - pond - - - pool - - waters (geographic) - - - brackish water - - - coastal water - - - continental waters - - - drainage water - - - flowing water - - - freshwater - - - high tide water - - - ice ( Ice crossings | Snow | Winter ) - - - - Glaciers ( Icebergs | Mountains ) - - - - Icebergs ( Glaciers ) - - - - Icicles - - - inland water - - - marine water - - - phreatic water - - - rain water - - - river water - - - salt water - - - sea water - - - seepage water - - - subterranean water - - - surface water - - - thermal waters - - - tidal water - Intertidal zonation - land ( Bodies of water | Land tenure | Land use | Mud | Nature | Soil conservation ) - - Arroyos ( Streams ) - - Buttes ( Hills | Mountains ) - - Capes (Coasts) ( Peninsulas | Waterfronts ) - - Caves ( Cave drawings | Cave dwellers | Cave dwellings | Rock formations | Stalactites & stalagmites ) - - Cliffs ( Canyons | Cliff dwellings | Mountains ) - - climatic zone - - - biogeographical regions - - - polar region - - - tropics - - Craters - - Croplands ( Farms | Land use | Meadows ) - - Cutover lands ( Clearing of land | Forestry | Lumber industry ) - - Deltas ( Rivers ) - - Deserts ( Dunes | Oases ) - - Dunes ( Beaches | Deserts ) - - Forests ( Forestry | Trees ) - - - Petrified forests ( Historic preservation | Petrified wood ) - - - Tropical forests - - geomorphic processes - - - avalanche - - - erosion ( Building deterioration | Dust storms | Erosion protection works | Geology | Landslides | Soil conservation ) - - - - Soil erosion - - - - Weathering - - - - - Soil formation - - - - - Water-rock interaction - - - landslide - - - landslip - - Hills ( Buttes | Mountains ) - - Islands - - Isthmuses - - landforms - - - alignment - - - alignment profile - - - altitude - - - benthic division - - - canyon - - - catchment area - - - catchment basin - - - cave - - - cavern - - - ditch - - - dunes ( Beaches | Deserts ) - - - embankment - - - geographic circus - - - hills ( Buttes | Mountains ) - - - hydrographic basin - - - ice-pack - - - icebergs ( Glaciers ) - - - lake basins - - - mud flat - - - orography - - - river basins - - - river bed - - - sand dunes - - - slope - - - submarine morphology - - - valley - - - water collection area - - - watersheds - - landscape - - - agricultural landscape - - - bocage - - - landscape component - - - mining landscape - - - natural scenery - - - terraced landscape - - - urban landscape - - Meadows ( Croplands | Grasses | Grazing | Pastures ) - - Mesas ( Mountains ) - - Mountains ( Avalanches | Buttes | Cliffs | Glaciers | Hills | Landslides | Mesas | Mountaineering | Passes (Landforms) | Volcanoes ) - - natural areas - - - alluvial plain - - - arid lands - - - arid zones - - - barrier beach - - - barrier reef - - - bays ( Harbors | Seas ) - - - beach - - - bog - - - brushwood - - - cliff - - - coast - - - coastal areas - - - coastal environments - - - coniferous forests - - - coppice - - - coppice with standards - - - coral reef - - - cove - - - deciduous forests - - - desert - - - disaster zone - - - forest - - - forestry unit - - - garrigue - - - glacier - - - grassland - - - gulfs - - - hazard area - - - headland - - - heath - - - high mountain - - - intertidal zone - - - island - - - karst - - - lagoon (coral reef) - - - lagoons - - - littoral - - - maquis - - - marginal lands - - - marine environments - - - marsh - - - marshes - - - meadow - - - Mediterranean forest - - - Mediterranean woods - - - mixed forest - - - moor - - - mountain - - - mountain forest - - - mountain ranges - - - mountainous area - - - natural forest - - - open lawn - - - peat bog - - - plains - - - primary forest - - - private forest - - - rain forest - - - reefs ( Seas ) - - - relief (land) - - - riparian zone - - - riverside vegetation - - - salt marsh - - - salt meadow - - - sand flat - - - sea bed - - - sea shores - - - sensitive natural area - - - shrubs ( Willows ) - - - - Hibiscus - - - - Lilacs - - - - Rhododendrons - - - - - Azaleas - - - state forest - - - temperate woodlands - - - terrestrial areas - - - timber forest - - - tropical forests - - - tropical rain forest - - - tundra - - - volcanic area - - - volcano - - - wetlands ( Bodies of water | Reclamation of land ) - - - - Bogs - - - - Fens - - - - Forested wetlands - - - - Marshes - - - - Moors and heaths - - - - Riparian areas - - - - Swamps - - - - Tidal flats - - - wood - - Oases ( Bodies of water | Deserts | Water holes ) - - Passes (Landforms) ( Mountains ) - - Peninsulas ( Capes (Coasts) ) - - Plains - - Prairies - - protected area - - - anthropologic reserve - - - biological reserves - - - biosphere reserves - - - bird sanctuary - - - central park area - - - drinking water protection area - - - estuarine conservation areas - - - European nature reserve - - - forest biological reserve - - - forest reserves - - - integral natural reserve - - - landscape protection area - - - marine park - - - marine reserves - - - multiple use management area - - - national park - - - natural area of ecological, animal, floristic interest - - - natural monument - - - natural park - - - nature reserve - - - peripheral park area - - - protected environment zone - - - protected landscape - - - protected marine zone - - - protected site - - - protected water catchment area - - - refuge - - - regional natural park - - - reserve - - - resource reserve - - - state biological reserve - - - unpolluted air area - - - voluntary natural reserve - - - wildlife sanctuary - - - world heritage site - - Reefs ( Seas ) - - Rock formations ( Boulders | Caves | Rocks | Volcanic rock ) - - - Boulders ( Rock formations | Rocks ) - - Sandbars ( Seas | Streams ) - - sensitive areas - - - ecological sensitive area - - Valleys ( Rivers ) - - - Canyons ( Cliffs )