U.S. Congressional Budget Office.
Available online.
"Over the past several years, spurred by both rising gasoline prices and long-standing subsidies for producing ethanol, the use of ethanol as a motor fuel in the United States has grown at an annual average rate of nearly 25 percent. U.S. consumption of ethanol last year exceeded 9 billion gallons-a record high. CBO released a paper today that discusses the relationship between ethanol, greenhouse-gas emissions, food prices, and federal spending on nutrition programs."
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