Extraction of petroleum
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Petroleum is a fossil fuel that can be drawn from beneath the Earth's surface. Reservoirs of petroleum are formed through the mixture of plants, algae, and sediments in shallow seas under high pressur
Pumpjack on an oil well in Texas
Steam is injected into many oil fields where the oil is thicker and heavier than normal crude oil.
Air pollution 3
Petroleum
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Petroleum, also known as crude oil or simply oil, is a natural resource that appears as a yellowish-black liquid chemical mixture found in geological formations, consisting primarily of hydrocarbons.
A sample of petroleum
An oil refinery in Ahmadi Governorate in Kuwait
An oil derrick in Okemah, Oklahoma in 1922