Web Results

Coal

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 - U.S. Energy Information Administration (EIA)

www.eia.gov/coal/

Operating coal-fired generating capacity has declined 15% since 2011 in response to low natural gas prices and environmental regulatory compliance.

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

www.eia.gov/basics/coal_basics.html

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 - 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 | Department of Energy

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 ...

World Coal Association

www.worldcoal.org/

Welcome to World Coal Association, where you'll find information about coal, the environment, sustainable development, coal industry news, global coal facts ...

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 | Environment | The Guardian

www.theguardian.com/environment/coal

Toxic emissions surged after AGL acquired Bayswater coal-fired power plant ... Guardian Environment Network Existing coal, oil and gas fields will blow carbon  ...

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

Answers
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.