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Coal is a type of fossil fuel, formed when dead plant matter decays into ... the deeper the coal is found, ... those known as anthrakes [coals] are made of earth, and ...
The earliest reference to the use of coal in metalworking is found in the geological treatise On stones (Lap. 16) by the Greek scientist Theophrastus (c. 371–287 BC): Among the materials that are dug because they are useful, those known as coals are made of earth, and, once set on fire, they burn like charcoal.
Coal forms when organic matter builds up in waterlogged, anoxic swamps, known as peat mires, and is then buried, compressing the peat into coal. The majority of Earth's coal deposits were formed during the late Carboniferous and early Permian. The plants from which they formed contributed to changes in the Carboniferous Earth's atmosphere. [25]
A fossil fuel [a] is a carbon compound- or hydrocarbon-containing material [2] formed naturally in the Earth's crust from the buried remains of prehistoric organisms (animals, plants or planktons), a process that occurs within geological formations.
It is also found as fossil fuels in coal and petroleum and gas. Native forms of carbon are much rarer, requiring pressure to form. Pure carbon exists as graphite or diamond. [1] The deeper parts of Earth such as the mantle are very hard to discover. Few samples are known, in the form of uplifted rocks, or xenoliths.
A 2020 study found that renewables jobs could feasibly be created in these geographies to replace many of the coal mining jobs as part of a just transition; however, renewable energy was not suitable in some of the geographies with high concentrations of miners, such as in China, which is far and away the leading coal-mining nation.
In the 1990s, coal tar was discovered in Greenville's Newtown neighborhood. While the state takes on years of cleanup, residents want to be involved.
It is the most abundant rank of coal, with deposits found around the world, often in rocks of Carboniferous age. Bituminous coal is formed from sub-bituminous coal that is buried deeply enough to be heated to 85 °C (185 °F) or higher. Bituminous coal is used primarily for electrical power generation [1] and in the steel industry.