Petroleum

Petroleum (from Greek petra – rock and oleum – oil), crude oil, sometimes colloquially called black gold, is a thick, dark brown or greenish liquid. A widely believed myth is that the oil itself is flammable, however it is actually the gas that evaporates from the oil that is flammable. Petroleum exists in the upper strata of some areas of the Earth's crust. Another name is naphtha, from Persian naft or naf?t? (to flow). It consists of a complex mixture of various hydrocarbons, largely of the alkane series, but may vary much in appearance, composition, and purity. It is an important "primary energy" source (IEA Key World Energy Statistics). Petroleum is also the raw material for many chemical products, including solvents, fertilizers, pesticides, and plastics.

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Greek: The noun Greek refers to:...

Rock: Rock may refer to:...

Oil: Oil is a generic term for organic liquids that are not miscible with water. The name comes from Latin oleum (olive oil)....

Petroleum related Images and Photos (experimental)

Refinery Turns Petroleum Into Gas for the War