what is coal ? what are its type?
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what is coal ? what are its type?
Coal is a nonrenewable resource known as a fossil fuel. It's the most abundant fossil fuel we have. The four types of coal include peat, lignite, bituminous, and anthracite, with anthracite being most desirable due to its high heat content.
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Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. 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.
Types of coal:
- Anthracite
- Lignite
- Bituminous coal
- Sub-bituminous coal
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