"are looking to the nation's cornfields these days to solve the United States' energy problems." In 2004, for example, the United States imported 4.9 billion barrels of crude oil, and American motorists used 139 billion gallons of gasoline, not counting diesel fuel consumption. Replacing a quarter of gasoline consumption would equal 35 billion gallons. Because ethanol generates less energy than gasoline, 52 billion gallons of ethanol would seem to be required.
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