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Photo Source: http://www.york.ac.uk/res/sots/eggs2mi.htm

Actually, the burning of coal is the leading cause of global warming, smog, acid rain, and other toxic air pollutants in the world. According to the Union of Concerned Scientists, a typical coal plant emits 3,700,000 tons of carbon dioxide, 10,000 tons of sulfer dioxide, and 10,200 tons of nitrogen oxide, as well as many other harmful and polluting substances including carbon monoxide, murcury, arcenic, and lead.