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www.reference.com/article/coal-used-f9c944d246ac99d

The primary use of coal is as a source of energy. Nations around the world use coal to produce electricity. Steel manufacturers also use coal to create a fuel called coke. Coal is formed from plants that were buried in the earth millions of years ago.

www.reference.com/article/uses-coal-3f97d1cba82de509

According to the World Coal Association, the primary uses of coal are in electricity generation, the creation of liquid fuel, the production of steel and cement manufacturing. There are two primary types of coal, thermal coal and metallurgical coal. Thermal coal goes in...

www.reference.com/article/coal-made-3f6eda3c4aa295c1

Coal is a sedentary rock that varies in composition. It forms as organic material compressed under the layers of soil and more organic material above it.

www.reference.com/article/coal-form-beebcc88ea79d108

Coal forms from the physical and chemical alteration of organic peat moss. This process, called coalification, takes hundreds of years to complete. During coalification, peat moss undergoes a series of transformations as a result of bacterial decay, compaction, variatio...

www.reference.com/article/hardness-coal-a5a6cb2d312f4943

The most common type of coal is anthracite, which has a hardness of 2.2 when compared to the Moh's scale of mineral hardness, according to the Ted Pella website. However, since coal is not a mineral, it is not officially measured in this way.

www.reference.com/article/coal-found-2b8d736e77c1916f

Coal reserves exist in every country in the world and on every continent except Antarctica. According to the World Coal Association, there are enough coal reserves to meet current demand for 112 years, but only enough oil and gas reserves to meet current demand for the ...

www.reference.com/article/coal-used-today-f595577951ed5be4

Coal is used as fuel for power plants generating electricity, when heating structures and in the steel manufacturing process. Many important substances are also made from the by-products of burning coal, including those used in the chemical, paper, construction and phar...