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Petroleum Simple English Wikipedia, the free encyclopedia.
Petroleum, from Greek rock and oil also called crude oil, is a thick and black liquid. It is a natural material mainly made of hydrocarbons. Most petroleum is found by drilling down through rocks on land or off shore on the continental shelf.
Petroleum Information on Petroleum and Crude Oil.
World War I was the real catalyst for petroleum production, with more petroleum being produced throughout the war than had ever been produced previously. In modern times petroleum is viewed as a valuable commodity, traded around the world in the same way as gold and diamonds.
Petroleum Wikipedia.
6 In the 19th century, the term petroleum was often used to refer to mineral oils produced by distillation from mined organic solids such as cannel coal and later oil shale and refined oils produced from them; in the United Kingdom, storage and later transport of these oils were regulated by a series of Petroleum Acts, from the Petroleum Act 1863 onwards.
Frequently Asked Questions FAQs - U.S. Energy Information Administration EIA.
Crude oil is a mixture of hydrocarbons that exists as a liquid in underground geologic formations and remains a liquid when brought to the surface. Petroleum products are produced from the processing of crude oil and other liquids at petroleum refineries, from the extraction of liquid hydrocarbons at natural gas processing plants, and from the production of finished petroleum products at blending facilities.
petroleum Energy, Products, Facts Britannica.
The liquid and gaseous phases of petroleum constitute the most important of the primary fossil fuels. Liquid and gaseous hydrocarbons are so intimately associated in nature that it has become customary to shorten the expression petroleum and natural gas to petroleum when referring to both.

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