Coal - Wikipedia
WebCoal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Coal - National Geographic Society
WebOct 19, 2023 · Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity. It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning).
Coal | Uses, Types, Pollution, & Facts | Britannica
WebApr 16, 2024 · Coal is defined as having more than 50 percent by weight (or 70 percent by volume) carbonaceous matter produced by the compaction and hardening of altered plant remains—namely, peat deposits. Different varieties of coal arise because of differences in the kinds of plant material (coal type), degree of coalification (coal rank), and range of ...
What is coal? | U.S. Geological Survey - USGS.gov
WebCoal 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.
Coal explained - U.S. Energy Information Administration (EIA)
WebCoal 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.
Coal: Anthracite, Bituminous, Coke, Pictures, Formation, Uses
WebCoal is an organic sedimentary rock that forms from the accumulation and preservation of plant materials, usually in a swamp environment. Coal is a combustible rock and, along with oil and natural gas, it is one of the three most important fossil fuels.
Coal explained Where our coal comes from - U.S. Energy …
WebDec 22, 2023 · Where the United States gets its coal. In 2022, about 594 million short tons of coal were produced in 21 U.S. states. Surface mines were the source of 63% of total U.S. coal production and accounted for 65% of the total number of producing mines.
Coal - Carbon, Organic Matter, Sedimentary Rock | Britannica
WebCoal - Carbon, Organic Matter, Sedimentary Rock: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins.
coal summary | Britannica
WebCoal mining, extraction of coal deposits from the surface of Earth and from underground. Coal is the most abundant fossil fuel on Earth. Its predominant use has always been for producing heat energy.
Coal Burning, Fossil Fuels, Pollution - National Geographic
WebOf all fossil fuels, coal puts out the most carbon dioxide per unit of energy, so burning it poses a further threat to global climate, already warming alarmingly.
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