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What Are The 3 Categories Of Pollutants From Burning Of Coal

Jan 29, 2020nbsp018332Hard vs. Soft Coal falls into two main categories hard and soft. Soft coal is also known as brown coal or lignite.China produces more hard coal than any other country by a factor of about three. The whopping 3,162 million metric tons of hard coal produced by China dwarfs the output of the second and thirdranked producersthe U.S. at 932 million metric tons and India at 538 million metric ...

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