The Role of Ethanol in America's Future Ethanol has a long history of use as a gasoline additive in the United States. Prohibition in the early 20th century spurred initial commercial production as it was used as a solvent in medicinal tonics. During World War II, gasoline rationing led fuel suppliers to incorporate ethanol into blends to extend petroleum supplies. However, it was not until the 1970s energy crisis that the federal...
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