Question

why petroleum is said to be 'black gold'​

Answer 1

Answer:

Petroleum is referred to as 'black gold' because when crude oil is extracted from the land it is black in colour. People call it gold because of its oils and value. It is very difficult to find.

Explanation:

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Answer 2

Answer:

Petroleum is extracted from the Earth's crust .Petroleum products are widely used ranging from fuel in automobiles to commonly used cosmetics. Because of its extensive uses and importance, petroleum is also called black gold....