besides, if the high-energy composite charcoal is prepared into power plant used coal, the pollutants including sulfur, phosphorus, carbon dioxide, nitric oxide and the like are minimal, the combustion value is stable and is not inhibited by a raw coal fuel, andbecause 70 to 90 percent of the raw materials come from plant straws, the high-energy composite charcoal is called as 'eternal coal'.
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