"Over the past year, U.S. farmers used 5 billion bushels of corn for animal feed and residual demand. During the time timeframe, the nation used more than 5.05 billion bushels of corn to fill its gas tanks. And, while some of the corn used to produce these biofuels will be returned to the food supply (as animal feed and corn oil), a large proportion of this corn will be solely dedicated to our gas tanks".
Ethanol is not a very sustainable fuel source, especially considering its total energy output and how many resources are needed to grow the corn.
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