Petroleum

Petroleum How is petroleum generated?
How is petroleum generated?
Petroleum is a naturally occurring liquid found beneath the earth's surface that can be refined into fuel. ... Petroleum is formed when large quantiti...
Petroleum Petroleum is found only in gulf countries?
Petroleum is found only in gulf countries?
Where is petroleum mostly found?Why is there petroleum in Gulf countries?Is petroleum found in West Asia?Where is the petroleum found in India?Which ...