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treset
Peat consists of partially decomposed plant debris. It is considered an early stage in the development of coal. Peat is distinguished from lignite by the presence of free cellulose and a high moisture content (exceeding 70 percent). The heat content of air-dried peat (about 50 percent moisture) is about 9 million Btu perton. Most U.S. peat is used as a soil conditioner. The first U.S.electric power plant fueled by peat began operation in Maine in 1990.
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