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Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons. It is the most abundant fossil fuel produced in the United States.
The energy in coal comes from the energy stored by plants that lived hundreds of millions of years ago, when the Earth was partly covered with swampy forests.

Coal - Wikipedia

en.wikipedia.org/wiki/Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder ...

Coal - Energy Explained, Your Guide To Understanding Energy ...

www.eia.gov/energyexplained/index.cfm/index.cfm?page=coal_home

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 ...

Coal | Department of Energy

www.energy.gov/coal

Coal. Coal is the largest domestically produced source of energy in America and is used to generate a significant chunk of our nation's electricity. The Energy ...

coal | fossil fuel | Britannica.com

www.britannica.com/science/coal-fossil-fuel

Jun 10, 2016 ... Coal, solid, usually brown or black, carbon-rich material that most often occurs in stratified sedimentary deposits. It is one of the most important ...

Coal Headwear

www.coalheadwear.com/

Special Edition · EBBETS FIELD x COAL · Field Team Badges · COAL x DDC x USA KIT · Limited Edition · Red Fang Collection ... Coal Headwear LLC.

Coal - International Energy Agency

www.iea.org/topics/coal/

Coal is a variety of solid, combustible, sedimentary, organic rocks, formed from vegetation that has been consolidated between other rock strata and altered by ...

Coal - US Energy Information Administration - Department of Energy

www.eia.doe.gov/kids/energyfacts/sources/non-renewable/coal.html

Coal - The New York Times

www.nytimes.com/topic/subject/coal

News about coal. Commentary and archival information about coal from The New York Times.

Coal Will Walk A Ledge in 2017 - Scientific American

www.scientificamerican.com/article/coal-will-walk-a-ledge-in-2017/

Dec 27, 2016 ... Rising prices and demand will heighten the fight between coal and natural gas for market share.