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Why is petroleum also known as ‘black gold’?

 
Coal and Petroleum
Last Post by Nupoor1234 4 years ago
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19/04/2021 11:18 am
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Rohit1998
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Why is petroleum also known as ‘black gold’?

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class 8 cbse ncert coal petroleum
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19/04/2021 11:19 am
Nupoor1234
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Due to its great commercial importance, petroleum is known as ‘black gold’.

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