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Only 1 percent of all corn grown in this country is eaten by humans. The rest is No. 2 yellow field corn, which is indigestible to humans and used in animal feed, food supplements and ethanol.
Yes, but the acreage could be used for food crops.
As said above, the corn lobby, including farmers, huge agribusiness, and farmer co-op ethanol plants, are the driving force behind corn-based ethanol fuel preferences.