乙醇需求增长(2)

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乙醇需求的增长不仅仅让农民看到了希望也让能源产业看到了曙光In the United States, vehicles that run on pure ethanol are rare. But most cars can run on a mixture of gasoline and ten percent ethanol. Some states require an ethanol-gas mixture to cut pollution.
Yet the use of an important food crop for fuel has led to concerns. Ethanol now makes up abou…