Earth Audit: The World Environment, 1972 to 1992 : where Now? |
Common terms and phrases
20 years ago 30 per cent acid rain action adequate sanitation Africa agriculture air pollution areas Asia assessment atmosphere average biodiversity carbon dioxide caused centre century CFCs chemicals clean climate conservation consumes consumption convention crops damage deforestation depletion desertification developing countries disease Dr M. K. Tolba droughts dust and soot Earth economic ecosystems effects emitted energy environmental issues environmental refugees erosion forest freshwater fuel fuelwood genes gigawatts global warming greenhouse gases gross domestic product half hazardous wastes hectares human improve increase industrial countries irrigation killed Kuwait land degradation launched levels live million hectares million tonnes Nations Environment Programme natural gas nearly nitrogen oxide OECD OECD countries oxide emissions ozone layer past 20 past two decades planet's plants produce protects red tides rivers sewage soil species sulphur dioxide temperature tourism towns and cities tropical UNEP UNEP's Executive Director urban US$40 billion UV-B vehicles water and adequate