A Coal is a black or brownish black solid, combustible substance formed by the partial Decomposition of vegetable matter without access to air.

The rank of coal, which includes anthracite, bituminous coal, subbituminous coal, and lignite, is based on fixed carbon, volatile matter, and heating value. Coal rank indicates the progressive alteration, or coalification, from lignite to anthracite. See anthracite, bituminous coal, subbituminous coal, lignite.

-See also:
"Coal" is in the NAICS Code "212111"
(Bituminous Coal and Lignite Surface MiningBituminous coal or lignite beneficiating (e.g., cleaning, crushing, screening, washing))


"Coal" is in the CPC Code "110"
Coal and lignite; peat

"Coal" is in the HS Code "2705.00"
- Coal gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous hydrocarbons.

"Coal" is in the UNSPSC Code "20101503"
Coal cutters


Other /More definition:
Coal is formed from plant and animal matter that has been subjected to geologic heat and pressure, transformed over millions of years into hard black solids. Because coal is a readily available resource in the United States, coal power plants provide about half of the nation's electricity. However, coal-fired power plants generally cause more pollution per unit of electricity than any other fuel. Most coal plants are required to have several pollution control devices to reduce the amount of pollutants that are released into the air from burning the coal. These controls have played an important role in cleaning up air quality in many areas of the country.

-See also:
"Coal" is in the NAICS Code "212111"
(Bituminous Coal and Lignite Surface MiningSemianthracite surface mining and/or beneficiating)


"Coal" is in the CPC Code "172"
Coal gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous hydrocarbons

"Coal" is in the HS Code "2708"
Pitch And Pitch Coke, Obtained From Coal Tar Or From Other Mineral Tars

"Coal" is in the UNSPSC Code "30121501"
Coal tar


List of books: Coal

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