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Option 2 : Peat, Lignite, Bituminous, Anthracite
Peat is the lowest grade of coal and has about 50% of carbon. Lignite as compared to Peat is better and has 65-70% of carbon. Bituminous and Anthracite are good quality coal with Bituminous having approx 75-80% of carbon and Anthracite having 90-95% of carbon. India is considered to be rich in Bituminous coal.
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