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What is crude oil
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Crude oil, also known as petroleum, is a naturally occurring, unrefined mixture of hydrocarbons that exist in liquid form in underground reservoirs and is often found in association with natural gas. It is composed mainly of alkanes and cycloalkanes, and depending on the composition, it may also contain a variety of other organic compounds such as sulfur, oxygen, and nitrogen. Crude oil varies in color from black to reddish-brown and can have a wide range of viscosities. It is used to refine a wide range of products, including gasoline, diesel fuel, heating oil, jet fuel, and lubricants.
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