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  1. Coal - Wikipedia

    Coal ... Coal 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, …

  2. Coal | Uses, Types, Pollution, & Facts | Britannica

    Nov 8, 2025 · 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, …

  3. Coal explained - U.S. Energy Information Administration (EIA)

    Oct 24, 2023 · 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 …

  4. What is coal? | U.S. Geological Survey - USGS.gov

    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 …

  5. Coal - National Geographic Society

    Nov 15, 2024 · 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 …

  6. Coal - Understand Energy Learning Hub

    Form of Energy: Chemical Coal is the most carbon-intensive and dirtiest fossil fuel. It is a chemically complex, rock-like hydrocarbon that contains heavy metals (e.g., mercury and lead), sulfur, and …

  7. Fact Sheet: Coal - Department of Energy

    Apr 22, 2024 · This fact sheet provides information about coal and the work FECM is doing to reduce the environmental impacts associated with coal.

  8. Coal - WorldAtlas

    Jun 13, 2025 · Coal is a combustible black or brownish-black sedimentary rock formed from the remains of ancient plant matter. It is primarily composed of carbon, along with hydrogen, sulfur, oxygen, and …

  9. Coal - Price - Chart - Historical Data - News

    Coal prices rose to around $111 per tonne, reaching their highest levels since late August amid hopes that top consumer China will roll out new stimulus measures.

  10. WSGS - What is Coal

    Coal is an organic sedimentary rock that is formed from compressed plant matter and debris accumulated in slow-moving bodies of water, such as swamps. It is predominantly composed of …