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Coal is a black sedimentary rock found in rock strata in layers called coal beds. It is a combustible resource and is composed of carbon, sulphur, hydrogen, oxygen, and nitrogen.
Used primarily as a fuel, coal is also used for the production of electricity and other industrial purposes.
The World Map with top ten countries by coal production shows the top ten countries by hard coal production in million tonnes.
The map shows China as the largest producer of coal; in 2010 the country produced 3162 million tonnes of coal. The second-largest producer of coal is the United States followed by India, Australia, South Africa, Russia, Indonesia, Kazakhstan, Poland, and Colombia.