Lignite is a form of coal has the highest sulfur content.
Coal is ranked based on the degree of carbon contained in the coal. The best coal has the highest amount of carbon and hence it is the cleanest.
Lignite is brownish black and it is also called brown coal. It has the least carbon concentration and the highest sulfur content. It gives out the highest heat.
Anthracite referred to as hard coal is black and lustrous. Anthracite has low in sulfur and high carbon. It is the highest rank of coal.
Lignite is a form of coal has the highest sulfur content.
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