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A 1.1 mpg increase in passenger vehicle fuel efficiency would save as many gallons of oil as all the ethanol produced today. (See more ways to boost the U.S. fuel economy in the Image Gallery.) Feed Crop Versus Cellulosic EthanolEthanol can be made from feed crops such as corn, or cellulosic sources such as grasses, leftover corn stalks, and other woody materials with no food value.
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