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Petroleum - Wikipedia
Extraction, refining and burning of petroleum fuels counteract carbon sinks by releasing large quantities of greenhouse gases back into the Earth's atmosphere, making petroleum one of the major contributors to anthropogenic climate change.

Petroleum | Energy, Products, & Facts | Britannica
A natural resource, petroleum is most often conceived of in its liquid form, commonly called crude oil, but, as a technical term, petroleum also refers to natural gas and the viscous or solid form known as bitumen, which is found in tar sands.

What is Petroleum: Definition, Formation, Constituents, Types and Uses
Petroleum, a naturally occurring liquid found beneath the earth’s surface, originates from the decomposition of organic matter over millions of years. The formation of petroleum begins with ancient marine organisms, such as plankton and algae, settling at the bottom of oceans and seas.

Petroleum - National Geographic Society
Petroleum, also called crude oil, is a fossil fuel. Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria.

Petroleum | Journal | ScienceDirect.com by Elsevier
Read the latest articles of Petroleum at ScienceDirect.com, Elsevier’s leading platform of peer-reviewed scholarly literature

Petroleum in the United States - Wikipedia
Petroleum has been a major industry in the United States since the 1859 Pennsylvania oil rush around Titusville, Pennsylvania. Commonly characterized as "Big Oil", the industry includes exploration, production, refining, transportation, and marketing of oil and natural gas products. [2]

Oil and petroleum products explained - U.S. Energy Information ...
Over millions of years, the remains of these animals and plants were covered by layers of sand, silt, and rock. Heat and pressure from these layers turned the remains into what we now call crude oil or petroleum. The word petroleum means rock oil or oil from the earth.

PETROLEUM Definition & Meaning - Merriam-Webster
The meaning of PETROLEUM is an oily flammable bituminous liquid that may vary from almost colorless to black, occurs in many places in the upper strata of the earth, is a complex mixture of hydrocarbons with small amounts of other substances, and is prepared for use as gasoline, naphtha, or other products by various refining processes.

Petroleum - Simple English Wikipedia, the free encyclopedia
Most petroleum is found by drilling down through rocks on land or off- shore on the continental shelf. Major producers are in the Middle East, the Americas, and Russia.

Petroleum - an overview | ScienceDirect Topics
Petroleum, a naturally occurring substance, is a complex mixture of hydrocarbons, organic compounds, and metals. Petroleum and its products have brought dramatic conveniences to modern human life.