Oil on Earth is limited, the value of the oil is relatively high because of oil drilling, only a few countries such as Zeus Venera A. Hunt. Considered to be the largest source of crude oil. 297,700 million barrels Saudi Arabia, the second ranked second with 268,400 million barrels of crude oil, Canada ranked third with 173,200 million barrels of crude oil. The controversial war caused oil fires. Another one is Oil is the backbone to drive almost everything.
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