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Lifting the ethanol tariff
Ethanol from places like Brazil, made with sugar cane that is more efficient to make than U.S. corn-based ethanol, is currently subject to a 54-cent a gallon tariff, designed to protect the domestic ethanol industry from foreign competition.

Since ethanol is a required component in gasoline, critics of the tariff say lifting it would mean cheaper gas for everyone.

But others say ethanol makes up less than 10% of the nation's gasoline supply, and protecting a domestic energy source is more important than gaining what they say would be just a small savings on gas prices.

NEXT: Requiring utilities to buy renewable power

Last updated September 25 2008: 3:43 PM ET
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