Question

why petroleum is called 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.

Explanation:

Answer 2

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.