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

Add a new term

Contributors in Coal

Become a Contributors

Coal

Compressor station

Energy; Coal

Any combination of facilities that supply the energy to move gas in transmission or distribution lines or into storage by increasing the pressure.

Electric utility sector

Energy; Coal

The electric utility sector consists of privately and publicly owned establishments that generate, transmit, distribute, or sell electricity primarily for use by the public and that meet the ...

Conservation programme

Energy; Coal

A programme in which autility company furnishes home weatherization services free or at reduced cost or provides free or low cost devices for saving energy,such as energy efficient light bulbs, flow ...

Emergency backup generation

Energy; Coal

The use of electric generators only during interruptions of normal power supply.

Emergency energy

Energy; Coal

Electric energy provided for a limited duration, intended only for use during emergency conditions.

Consolidated metropolitan statistical area (CMSA)

Energy; Coal

An area that meets the requirements of a metropolitan statistical area, has a population of one million or more, and consists of two or more component parts that are recognised as primary ...

Electricity sales

Energy; Coal

The amount of kilowatthours sold in a given period of time; usually grouped by classes of service, such as residential, commercial, industrial, and other. "Other" sales include sales for public ...