Question

petroleum is referred to black gold​

Answer 1

Explanation:

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.

Answer 2

Petroleum is usually found in geological formations underneath the earth's crust. When the petroleum is drilled from the ground in the liquid form, it is referred to as crude oil. This name black gold itself is an indication that it is very vital to humans. Because of its oil and worth, people refer to it gold......

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