1960, oil energy began to be used in industries because it was cheap, and there was a lot of oil in the world. Even in the U.S.A., there are large oil fields in California and Texas. Consequently, because gas was inexpensive, most Americans own cars. Now, oil is still being used to generate energy. However, there are no longer than three generations, mankind will run out of oil energy. The Cambridge Energy Research Associates (CERA) estimated that there are still 3.74 trillion barrels of oil left…
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