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
Pumpjack pumping an oil well near Lubbock, Texas, U.S.
An oil refinery in Ahmadi Governorate in Kuwait
An oil derrick in Okemah, Oklahoma in 1922
Petroleum industry
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The petroleum industry, also known as the oil industry, includes the global processes of exploration, extraction, refining, transportation, and marketing of petroleum products. The largest volume prod
Oil Field in Baku, Azerbaijan, 1926
Natural oil spring in Korňa, Slovakia
Oil wells in Boryslav
Galician oil wells