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Study finds São Paulo switch from ethanol to gasoline dropped local ozone levels by 20%, increased CO and nitric oxide concentrations

Green Car Congress

A study by a pair of researchers at Northwestern University found that when fuel prices drove residents of São Paulo, Brazil, to switch from ethanol to gasoline in their flexible-fuel vehicles, local ozone levels dropped 20%. Ozone levels are relatively high in São Paulo, with hourly concentrations above 75 and 125 µg m

Ozone 316
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São Paulo study finds concentration of ultrafine particulates rose by 1/3 in switch from ethanol to gasoline

Green Car Congress

This lockstep movement illustrates a very tight correlation between fuel choice and nanoparticles in the air. Geiger and Alberto Salvo, an associate professor of economics at the National University of Singapore, led the study—their second with São Paulo big data. These particles include fine particulate matter 2.5

Gasoline 150
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Flying first class on a single domestic round trip can contribute more greenhouse gas emissions than a year of driving

Green Car Congress

airline (San Francisco to Santa Rosa); the longest flight within the continental United States (Seattle to Miami); and the longest flight in the world (New York to Singapore). This is consistent with an estimate from the Worldwatch Institute that the most fuel-efficient distance is around 2,670 miles.). times to 2.98

Emissions 419