https://en.wikipedia.org/wiki/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, oxygen, and nitrogen. Coal is a type of fossil fuel, formed when dead plant matter decays into peat which is converted into coal by the heat and pressure of deep burial over millions of years.

https://www.nationalgeographic.org/encyclopedia/coal/
Learn about coal, a nonrenewable fossil fuel that is combusted and used to generate electricity. Explore the types, formation, mining, and environmental impacts of coal.

https://www.britannica.com/science/coal-fossil-fuel
Learn about coal, a solid carbon-rich material that is a major source of energy and a fossil fuel. Explore its geological origins, structure, properties, types, pollution, and global distribution.

https://www.usgs.gov/faqs/what-coal
Learn about coal, a sedimentary deposit of carbon formed from plant remains, and its types, uses, and distribution. Find out which country has the most coal and how the USGS assesses coal resources and reserves.

https://www.eia.gov/energyexplained/coal/
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 millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Layers of dirt and rock covered the

https://geology.com/rocks/coal.shtml
Learn about coal, an organic sedimentary rock that forms from the accumulation and preservation of plant materials in a swamp environment. Explore the different ranks of coal, from peat to anthracite, and their properties, uses, and examples.

https://www.britannica.com/technology/coal-mining
Learn about the extraction of coal deposits from the surface and underground, and the history and development of coal mining techniques. Explore the uses, properties, and environmental impacts of coal as a fossil fuel.

https://www.britannica.com/summary/coal-fossil-fuel
Coal is a fossil fuel formed by heat and pressure on ancient vegetation. It has various uses, such as power generation, coke production, and chemical synthesis, but also produces harmful by-products like carbon dioxide and heavy metals.

https://www.eia.gov/energyexplained/coal/where-our-coal-comes-from.php
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. About 0.5 million short tons, or less than 0.1% of total coal production, was refuse recovery coal.

https://www.nationalgeographic.com/environment/article/high-cost-coal
How coal-burning power plants supply electricity to millions of Americans and emit huge amounts of carbon dioxide and other pollutants. Learn about the challenges and solutions of using coal as a fossil fuel.

https://www.iea.org/energy-system/fossil-fuels/coal
The IEA provides data and analysis on coal demand, supply and CO2 emissions in 2022 and beyond. Learn about the trends, challenges and opportunities for coal transitions in the power sector and the Net Zero Emissions by 2050 Scenario.

https://www.eia.gov/coal/
Coal data browser; Data, charts, and maps of coal production, imports, exports, shipments, and individual mines Coal Markets; Spot coal prices by U.S. coal commodity regions (Central Appalachia, Northern Appalachia, Illinois Basin, Power River Basin, and Uinta Basin) Weekly Coal Production; Estimates of U.S. coal production by state and region

https://www.cnn.com/2022/12/16/world/coal-use-record-high-climate-intl/index.html
Coal is the world's largest source of energy for electricity generation and the production of steel and cement. But it is also the biggest single contributor to the climate crisis, accounting

https://www.britannica.com/science/coal-fossil-fuel/Coal-types
Coal - Anthracite, Bituminous, Lignite: Coals contain both organic and inorganic phases. The latter consist either of minerals such as quartz and clays that may have been brought in by flowing water (or wind activity) or of minerals such as pyrite and marcasite that formed in place (authigenic). Some formed in living plant tissues, and others formed later during peat formation or coalification.

https://understand-energy.stanford.edu/energy-resources/fossil-fuel-energy/coal
Coal is the most carbon-intensive fossil fuel and a huge contributor to climate change, air pollution, and land disruption. It is a chemically complex, rock-like hydrocarbon that contains heavy metals (e.g., mercury and lead), sulfur, and radioactive material. Coal is mined from the Earth and burned to convert chemical energy to heat.

https://geologyscience.com/rocks/coal/
Learn about coal, a non-clastic sedimentary rock formed from fossilized plants. Find out how coal is classified, mined, processed, and used as a fuel and a source of carbon.

https://www.livescience.com/how-does-coal-form
Coal forms when swamp plants are buried, compacted and heated to become sedimentary rock in a process called coalification. "Very basically, coal is fossilized plants," James Hower, a petrologist

https://www.ucsusa.org/resources/how-coal-works
How coal is formed. Coal is formed when dead plant matter submerged in swamp environments is subjected to the geological forces of heat and pressure over hundreds of millions of years. Over time, the plant matter transforms from moist, low-carbon peat, to coal, an energy- and carbon-dense black or brownish-black sedimentary rock.

https://www.britannica.com/science/coal-fossil-fuel/Structure-and-properties-of-coal
Coal - 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. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic (benzenelike) and hydroaromatic

https://www.ga.gov.au/education/classroom-resources/minerals-energy/australian-energy-facts/coal
Learn about coal, a sedimentary rock and a fossil fuel, from its properties, uses, history and formation. Explore the types, ranks and sources of coal in Australia and the world.

https://www.usgs.gov/faqs/what-are-types-coal
There are four major types (or "ranks") of coal. Rank refers to steps in a slow, natural process called "coalification," during which buried plant matter changes into an ever denser, drier, more carbon-rich, and harder material. The four ranks are: Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high

https://www.britannica.com/science/coal-fossil-fuel/World-distribution-of-coal
Coal - World Distribution, Fossil Fuel, Energy: Coal is a widespread resource of energy and chemicals. Although terrestrial plants necessary for the development of coal did not become abundant until Carboniferous time (358.9 million to 298.9 million years ago), large sedimentary basins containing rocks of Carboniferous age and younger are known on virtually every continent, including

https://dictionary.cambridge.org/dictionary/english/coal
Learn the meaning of coal, a hard, black substance that is used as a fuel, and see how it is used in sentences and phrases. Find out how to pronounce coal and how to translate it in different languages.