which is called black gold
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Explanation:
which is called black gold
- Black gold is a term applied to oil or petroleum, which is black when it comes out of the ground and is worth a great deal of money. Prior to the mid-19 th century, oil from animal tallow (fat) and whale blubber was used as a lubricant and fuel.
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which is called black gold.
Black gold is an informal term for oil or petroleum — black because of its appearance when it comes out of the ground, and gold because it made everyone involved in the oil industry rich.
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