When fuel prices drove residents of Sao Paulo, Brazil, to mostly switch from ethanol to gasoline in their flexible-fuel vehicles, local ozone levels dropped 20 percent, reports an economist and a chemist in a Northwestern University study. At the same time, nitric oxide and carbon monoxide concentrations tended to go up. The four-year study is the first real-world trial looking at the effects of human behavior at the pump on urban air pollution. This empirical ...
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titled Local Ozone Levels Drop 20 Percent With Switch from Ethanol to Gasoline.
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editor - Tuesday, April 29, 2014
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