Biosphere 2000: Protecting Our Global Environment

acid acid precipitation acres agriculture air pollution Aldo Leopold amount animals aquifer atmosphere biological biosphere carbon carbon dioxide cause Chapter chemical coal conservation consumers contain cost countries crops cultural resources degradation deposits dioxide disposal diversity Earth ecology economic ecosys ecosystem effects electricity emissions energy environment environmental problems erosion ethic example federal fertility Figure fish fossil fuels global groundwater habitat hazardous waste heat hectares human health increase industrial lakes land landfill LDCs levels living materials ment metals Miami University million minerals National Park natural systems nitrogen nuclear nutrients ocean organisms oxygen percent plants population growth precipitation preserve production programs protect radiation radioactive rain forests reactor recycling reduce rivers soil solid waste sources species substances sulfur sulfur dioxide Superfund supply temperature tion toxic trees trophic level tropical United wetlands whales wildlife Worldwatch Institute