Burning coal gives rise to a variety of wastes that must be controlled or at least accounted for. So-called "clean coal" technologies are a variety of evolving responses to late 20th century environmental concerns, including that of global warming due to carbon dioxide releases to the atmosphere. However, many of these methods have been applied for
by
themom
2007-08-17 11:33
clean coal
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emissions
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gas turbines
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gasification
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global warming