probelm is referred as black gold due to its imensive value
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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. Even its extraction is expensive. Petroleum, when crude oil is extracted it is jet black before purification but after purification, it turns golden in color; therefore, it's tagged as Gold .When it comes out of the ground and the term 'Gold' for of its rarity and utility associated with it.
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Petroleum is referred to as Black Gold. ... 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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