Coal | Uses, Types, Pollution, & Facts | Britannica
Nov 8, 2025 · Coal, one of the most important primary fossil fuels, a solid carbon-rich material, usually brown or black, that most often occurs in stratified sedimentary deposits, which may …
Coal explained - U.S. Energy Information Administration (EIA)
Oct 24, 2023 · Coal takes millions of years to form Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a …
What is coal? | U.S. Geological Survey - USGS.gov
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 moisture) consists of …
Coal: Anthracite, Bituminous, Coke, Pictures, Formation, Uses
What is Coal? Coal 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 …
Coal - National Geographic Society
Nov 15, 2024 · Coal is a nonrenewable fossil fuel that is combusted and used to generate electricity. Mining techniques and combustion are both dangerous to miners and hazardous to …
Coal - Understand Energy Learning Hub
Fast Facts About Coal Principal Energy Uses: Electricity, Heat Form of Energy: Chemical Coal is the most carbon-intensive and dirtiest fossil fuel. It is a chemically complex, rock-like …
Coal | Properties, Formation, Occurrence and Uses
Nov 1, 2021 · Coal is a non-clastic sedimentary rock. They are the fossilized remains of plants and are in flammable black and brownish-black tones. Its main element is carbon