Petroleum from Ancient Greek petra "rock" oleum "oil" is a naturally occurring, yellow to black liquid found in geological formations beneath the Earth s surface. It is commonly refined into various types of fuels..Petroleum, complex mixture of hydrocarbons that occur in Earth in liquid, gaseous, or solid form. The term is often restricted to the liquid form, commonly called crude oil, but, as a technical term, petroleum also includes natural gas and the viscous or solid form known as bitumen, which is found in tar sands..Petroleum products are fuels made from crude oil and other hydrocarbons contained in natural gas. Petroleum products can also be made from coal, natural gas, and biomass..
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Petroleum from Ancient Greek petra "rock" oleum "oil" is a naturally occurring, yellow to black liquid found in geological formations beneath the Earth's surface..
Energy Information Administration EIA Official Energy Statistics from the U.S. Government.
The petroleum supply situation in the context of historical information and selected prices..
The American Petroleum Institute API is the only national trade association that represents all aspects of America's oil and natural gas industry. Our more than .