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PSI team develops web tool for consumers to compare environmental impact of passenger cars in detail

Green Car Congress

The system will graph lifecycle impact for a range of specified powertrains, for a large number of impact categories: Climate change [kg CO 2 -eq.]. Deterioration of the ozone layer [kg CFC-11-eq.]. The top sample above shows climate change impact; the subsequent chart shows human toxicity. in review).

Mariner 435
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Study finds that environmental impact of corn-ethanol E85 is 23% to 33% higher than that of gasoline; environmental problem-shifting

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Environmental impacts of gasoline and E85. eutrophication; ET = ecological toxicity; FEC = fossil energy consumption; WU = water use; LO = land occupation; “The rest” includes acidification; smog formation; ozone layer depletion; and human health effects. Process flow diagrams for E85 and gasoline. GW = global warming; Eut.

Gasoline 357
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Researchers describe the “where” and “when” of life cycle emissions from gasoline and ethanol in the US

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Researchers from the University of Minnesota have produced a spatially and temporally explicit life cycle inventory (LCI) of air pollutants from gasoline, ethanol derived from corn grain, and ethanol from corn stover for the contiguous US (the lower 48 states). Credit: ACS, Tessum et al. Click to enlarge. the contiguous US).

Gasoline 236
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Tohoku team finds swirling ammonia in combustion chambers can help reduce NO emissions

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The process involves swirling the gas with air as part of the power generation process. So far, ammonia has been considered as a fuel when blended with gasoline, diesel, hydrogen and methane fuels to reduce the proportion of carbon-based fuels and their emissions that contribute to climate change. —Somarathne et al.

Emissions 308
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California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

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The California Air Resources Board’s latest state inventory of greenhouse gas emissions shows that California’s GHG emissions continue to decrease. Emissions from gasoline used in on-road vehicles are the main driver of that increase. MMTCO 2 e (6%) from 2013 to 2017.

2017 230
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US EPA proposing allowing high-octane, higher ethanol content fuels as part of Tier 3 regs; E30 as example

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Higher octane fuels can lead to higher compression ratios which in turn can lead to more efficient gasoline engines and reduced fuel consumption. With turbocharged gasoline engines, there is a double benefit: higher compression ratios and increased boost. Currently, the Clean Air Act limits the volatility of gasoline to 9.0

EPA 255
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Study Finds Current Swedish Biofuels Offer Major Climate Benefits; Biogas from Manure the Best

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A study by researchers at Lund University in Sweden found that Swedish biofuels produce between 65 and 148% less greenhouse gas emissions than gasoline and diesel, even when direct and indirect land use changes are taken into account. Direct and indirect land use changes were also studied. 68% from biodiesel (RME).

Climate 170