Question

Which fuel is known as “Black Gold”?
and this is used as main source of______.​

Answer 1

Answer:

Petroleum 

Explanation:

Hope this helps you.

Answer 2

1.oil

2.petroleum

Petroleum is referred to as Black Gold. This name itself is an indication of its importance to humans. It is called black gold because

It is black in colour when crude oil is extracted from the soil.

Because of its oil and worth, people call it gold.