Question

what is black gold ? explain it

Answer 1

Black gold is a liquid based term applied to oil or petroleum, which comes in black color when it comes out of the ground and is worth a great deal of money.

Answer 2

Petroleum is black gold and coal is black diamond. Oil as we all know is great for a country's economy, like gold. Coal is formed, after millions of years, from wood and in turn is transformed into diamonds after further millions of years.