is coal combustible

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  • What is coal?

  • What is coal? Coal is a sedimentary deposit composed predominantly of carbon that is readily combustible. Coal is black or brownish-black, and has a composition that (including inherent moisture) consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material.

  • What is the main source of energy in coal?

  • It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning). Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel in the United States. Fossil fuels are formed from the remains of ancient organisms.

  • Why is CO2 coal classified as a nonrenewable energy source?

  • Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Layers of dirt and rock covered the plants over millions of years. The resulting pressure and heat turned the plants into the substance we call coal.

  • Why is coal used as a fossil fuel?

  • Coals of varying composition are used as a combustible fossil fuel for generating electricity and producing steel around the world. It has been the fastest growing energy source worldwide in the 21st century, according to the International Energy Agency (IEA) Geological processes and decaying organic matter create coal over thousands of years.

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