Question

what is the substance known as black gold​

Answer 1

Required Answer:

☑ Coal is known as black gold because it's rare like gold and black in color.

Answer 2

Answer:

Petroleum has been nicknamed as the black gold. The reasons for petroleum being called so are:

1) Petroleum is scarce and hard to find in the Earth’s surface.

2) Petroleum is very costly to extract.

3) Petroleum is very valuable.

Explanation:

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