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| the process of destroying a forest and replacing it with something else |
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| the observed and projected increase in the earth’s average temperature due to burning of fossil fuels and deforestation |
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| any form of precipitation that is high in sulfuric and nitric acids as a result of pollution in the air |
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| Carbon dioxide emissions caused by burning of fossil fuels; largest contributor to global warming |
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| water beneath Earth’s surface in underground streams and other forms |
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| an underground layer of rock, gravel, etc., from which water can be drawn for wells and which is a source of springs |
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| various gases in the atmosphere that absorb and emit radiation, including carbon dioxide, methane, nitrous oxide, and zone |
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| ultraviolet radiation (UV) |
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Definition
| invisible rays from the sun that can cause skin cancer |
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| a thin layer of ozone in the atmosphere 15 to 30 kilometres above Earth; the ozone layer filters the sun’s ultraviolet (UV) rays |
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| a thin layer of ozone in the atmosphere 15 to 30 kilometres above Earth; the ozone layer filters the sun’s ultraviolet (UV) rays |
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| CFCs (chlorofluorocarbons) |
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Definition
| chemicals used in coolants, solvents, and aerosol cans that damage the ozone layer |
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Definition
| an international agreement signed in 1987 to phase out the ozone-depleting chemicals CFCs |
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| an international agreement that sets binding targets for reducing greenhouse gas emissions; the average target is 5 percent of 1990 levels by 2008–2012 |
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