3. Give reasons.
(iii) Petroleum is referred to as "black gold"
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Answer:
it is a very valuable so he reffered black gold
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Step-by-step explanation:
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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