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Gasohol is a fuel mixture composed primarily of gasoline and ethanol, typically a blend of 90% gasoline and 10% ethanol. Ethanol, also known as ethyl alcohol, is an important industrial chemical and can be produced through the fermentation of carbohydrates like grains (corn, wheat, rye, barley) or sugarcane, or synthesized by adding water to ethylene.123

Gasohol is considered a desirable alternative fuel because ethanol is a renewable resource. It burns well in standard gasoline engines and can often be used without modifications to the fuel system. The addition of ethanol to gasoline can help meet environmental requirements by aiding fuel combustion and reducing emissions of carbon monoxide and nitrogen oxides.425

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