Petrol

Petrol

a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. A fossil fuel, it is formed when large quantities of dead organisms, usually zooplankton and algae, are buried underneath sedimentary rock and undergo intense heat and pressure.

Industry: Energy

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Petrol

Operating unit

Energy; Coal

A unit that is in operation at the beginning of the reporting period.

Solar energy

Energy; Coal

The radiant energy of the sun, which can be converted into other forms of energy, such as heat or electricity.

Shortwall mining

Energy; Coal

Underground mining methods. Generally refers to the room-and-pillar mining in which the working face is wider than usual but smaller (less than 150 feet) than that in longwall mining.

Operating utilisation rate

Energy; Coal

Represents the use of the atmospheric crude oil distillation units. The rate is calculated by dividing the gross input to these units by the operating refining capacity of the units.

Radon

Energy; Coal

A naturally occurring radioactive gas found in the United States in nearly all types of soil, rock, and water. It can migrate into most buildings. Studies have linked high concentrations of radon to ...

Solar pond

Energy; Coal

A body of water that contains brackish (highly saline) water that forms layers of differing salinity (stratifies) that absorb and trap solar energy. Solar ponds can be used to provide heat for ...

Longwall mining

Energy; Coal

Underground mining methods. A technique that long sections of coal, up to about 700 feet, are removed and no pillars are left to support the mined-out areas. The working area is protected by a ...