Question

why petroleum is also called as black gold under 50 wirds​

Answer 1

Answer:

Petroleum is also known as Black Gold -

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

Answer 2

Answer:

Explanation:

Petroleum is very expensive so it is said to be gold like and since crude oil is black petroleum is called black gold