Coal - Research Article from Pollution A to Z

This encyclopedia article consists of approximately 6 pages of information about Coal.

Coal - Research Article from Pollution A to Z

This encyclopedia article consists of approximately 6 pages of information about Coal.
This section contains 1,644 words
(approx. 6 pages at 300 words per page)
Buy the Coal Encyclopedia Article

Coal is a brown-to-black combustible rock that originated from peat deposits in large swamp environments, through their burial to great depths and over a few hundred thousand to tens of millions of years. During burial peat is converted first into lignite, then subbituminous and bituminous coal, and, uncommonly, anthracite. Due to the loss of moisture during burial (peat has about 90 percent in its natural state, bituminous coal as little as 2 to 3 percent) and the chemical changes in the plant material that are induced by the rising temperature during burial to thousands of feet (increased carbon and decreased oxygen contents in particular), the heating value of coal increases significantly from peat to lignite and on to bituminous coal and anthracite.

The various environments that prevailed in the peat swamps (e.g., forests with large trees; marshes with sedges, grasses, and reeds) produced various kinds of peat and thus coal...

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This section contains 1,644 words
(approx. 6 pages at 300 words per page)
Buy the Coal Encyclopedia Article
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Macmillan
Coal from Macmillan. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.