petroleum
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Petroleum Products, Petroleum Jobs, Petroleum Industry ...
Petroleum (from Greek petra – rock and elaion – oil or Latin oleum ... Petroleum is found in porous rock formations in the upper strata of some areas of the ...
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Petroleum - New World Encyclopedia
Petroleum (Latin Petroleum derived from Greek πέτρα (Latin petra) ... Petroleum is used mostly, by volume, for producing fuel oil and gasoline (petrol), both ...
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Petroleum
Petroleum is also the raw material for many chemical products, ... Known reserves of petroleum are typically estimated at around 190 km3 (1.2 trillion ...
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