A recent study conducted by researchers at Stanford University has revealed that ethanol fuel produces more ozone that regular gasoline. When ethanol is burned through combustion, it produces emissions that are substantially higher than gasoline in aldehydes, the carcinogenic precursors to ozone.
Much of the fuel dispensed at pumps in America today is a blend of both ethanol and gasoline. E85, a typical gasoline blend that is 85 percent ethanol, was found to emit more ozone pollutants than gasoline, especially during warm, sunny days. Diana Ginnebaugh, a doctoral candidate who worked on the study, explained that even on cold days when ozone is typically not a problem, E85 could result in problematic levels of ozone.
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