Oil

What is petroleum?Petroleum is a complex mixture of hydrocarbons that occur on Earth in liquid, gaseous, or solid form. The term is often restricted to the liquid fo. . What is the first known use of the word petroleum?The word petroleum was first used in 1556 in a treatise published by the German mineralogist Georgius Agricola. It means, literally, “rock oil,” fr. . Where are there rich reserves of petroleum?Major petroleum-producing countries and regions include Venezuela, Saudi Arabia, Canada, Iran, Iraq, Kuwait, Russia and the Caspian Sea region, Wes. [pdf]
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