When coal, natural gas, or oil are burned, they release gases into the atmosphere. They are carbon dioxide, sulfur dioxide, nitrogen oxide, and other kinds of gases. The problem with carbon dioxide is that it is a green house gas. It traps heat in the atmosphere that prevents it from escaping into space. As a result, the planet gets warmer. Sulfur dioxide in the atmosphere can create acid rain. Nitrogen oxide also creates acid rain and smog. It can harm the health of humans in several ways.
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