Petroleum - Wikipedia
2021-9-7 · Petroleum (/ p ə ˈ t r oʊ l i ə m /), also known as crude oil and oil, is a naturally occurring, yellowish-black liquid found in geological formations beneath the Earth's surface. It is commonly refined into various types of fuels.Components of petroleum are separated using a technique called fractional distillation, i.e., separation of a liquid mixture into fractions differing in boiling ...
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