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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

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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 ?

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

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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. Officials, Geiger said, will need to weigh the increase in ozone against the decrease in nanoparticles when ethanol is used. are not regulated.

Gasoline 150
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New international study finds lab testing of diesel NOx emissions underestimates real-world levels by up to 50%

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in collaboration with scientists at the University of York’s Stockholm Environment Institute (SEI); University of Colorado; and the International Institute for Applied Systems Analysis, assessed 30 studies of vehicle emissions under real-world driving conditions in 11 major vehicle markets representing 80% of new diesel vehicle sales in 2015.

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Study estimates ~4M children worldwide develop asthma each year because of NO2 air pollution

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About 4 million children worldwide develop asthma each year because of inhaling nitrogen dioxide (NO 2 ) air pollution, according to an open-access study published in The Lancet Planetary Health by researchers at the George Washington University Milken Institute School of Public Health (Milken Institute SPH).

Pollution 360
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Perspective: US Needs to Transition to Hydrous Ethanol as the Primary Renewable Transportation Fuel

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Use of Hydrous Ethanol in Brazil. Brazil, the largest and most populous country in South America, was importing 80% of its oil and 40% of its foreign exchange was used to pay for that imported oil. In 1975, General Ernesto Geisel, then-president of Brazil, ordered the country’s gasoline supply mixed with 10% ethanol.

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SCOPE Biofuels Project Releases Assessment on Environmental Effects of Biofuel Technologies

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A few studies also include other relevant impact indicators as acidification potential, eutrophication potential, ozone depletion potential and various toxicity potentials. Impact of ethanol production on nutrient cycles and water quality: the United States and Brazil as case studies. However very few studies include water use impacts.