Petroleum | Energy, Products, & Facts | Britannica
https://www.britannica.com/science/petroleum
WEBApr 5, 2024 · petroleum, complex mixture of hydrocarbons that occur in Earth in liquid, gaseous, or solid form. 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.
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