Greenhouse Effect The phenomenon whereby the earth’s atmosphere traps solar radiation, caused by the presence in the atmosphere of gases such as carbon dioxide, water vapor, and methane that allow incoming sunlight to pass through but absorb heat radiated back from the earth’s surface. As the amount of carbon dioxide increases due to the combustion of fossil fuels and deforestation, especially of tropical rain forests, it is proposed that more heat energy will be retained by the earth’s atmosphere, resulting in a change in rainfall and wind patterns and melting of the polar ice, thus raising the global sea level. The change in weather patterns could have devastating consequences to the world’s present prime agricultural areas. A significant rise in seal level could flood many coastal cities and damage ecologically important coastal wetlands. Other heat-absorbing gases that are increasing in the atmosphere as a result of human activities are nitrous oxide and chlorofluorocarbons.
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Author of the Water Words Dictionary source of text: Gary A. Horton
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