19thcentury 20thcentury africa agriculture alaska animals antiquities arcticpeoples arcticregions asia aspectdel'environnement authors autobiography biodiversity biodiversityconservation biography bioticcommunities brazil business ca california canada casestudies china citizenparticipation cityandtownlife cityplanning climate climatechangemitigation climaticchanges co coastalzonemanagement colonies communitylife conditionsenvironnementales congresses conservation conservationists conservationofnaturalresources contamination descriptionandtravel desertecology developingcountries development disasterrelief disasters drinkingwater earthsciences ecology economicaspects economicconditions economicdevelopment economichistory economicpolicy economics ecosystems effectofenvironmenton effectofhumanbeingson elections emergencymanagement energypolicy environment environmental environmentalaspects environmentalconservation environmentaldegradation environmentaldisasters environmentaleconomics environmentalhealth environmentalimpactanalysis environmentalism environmentalists environmentaljustice environmentalmanagement environmentalpolicy environmentalprotection environmentalresponsibility environmentalsciences environnement europe florida forecasting forestmanagement forestpolicy frontierandpioneerlife general geography glaciers globalenvironmentalchange globalwarming government governmentpolicy greatbritain greenmovement greentechnology gulfof habitats healthandhygiene hi histoire historicalgeography history human-animalrelationships humanbeings humanecology humangeography humansecurity id india indiansofnorthamerica indiansofsouthamerica indigenouspeoples infrastructure japan lakes landscapeassessment landscapechanges landscapeprotection landtenure landuse law leadcontent local louisiana maine management massachusetts mexico michigan mt mythology nationalparksandreserves naturaldisasters naturalhistory naturalresources nature natureconservation newyork(state) northamerica nv oilspills olympics papuanewguinea personalmemoirs petroleumindustryandtrade philosophy physicalgeography plantecology polarregions politicalaspects politicalprocess politicalscience politicsandgovernment politiquegouvernementale pollution poverty powerresources prevention protection publicopinion publicpolicy rainforestecology regional religiousaspects remotesensing research restorationecology russia(federation) science socialaspects socialchange socialconditions sociallifeandcustoms socialscience sociology southernstates state streamecology sustainability sustainabledevelopment to1500 tourism traditionalecologicalknowledge travel tropics unitedstates urbanecology(biology) urbanecology(sociology) urbanization ut utah water water-supply waterquality waterqualitymanagement waterresourcesdevelopment west(ak wildernessareas wildlifeconservation wy)