Coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Industry: Energy

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Coal

Combined household energy expenditures

Energy; Coal

The total amount of funds spent for energy consumed in, or delivered to, a housing unit during a given period of time and for fuel used to operate the motor vehicles that are owned or used on a ...

Commercial sector

Energy; Coal

An energy-consuming sector that consists of service-providing facilities and equipment of businesses; Federal, State, and local governments; and other private and public organizations, such as ...

Electric power

Energy; Coal

The rate at which electric energy is transferred. Electric power is measured by capacity and is commonly expressed in megawatts (MW).

Commingling

Energy; Coal

The mixing of one utility's generated supply of electric energy with another utility's generated supply within a transmission system.

Electric power grid

Energy; Coal

A system of synchronised power providers and consumers connected by transmission and distribution lines and operated by one or more control centers. In the continental United States, the electric ...

Commissioned agent

Energy; Coal

An agent who wholesales or retails a refined petroleum product under a commission arrangement. The agent does not take title to the product or establish the selling price, but receives a percentage ...

Electric power plant

Energy; Coal

A station containing prime movers, electric generators, and auxiliary equipment for converting mechanical, chemical, and/or fission energy into electric energy.