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Texas study finds PHEV use could increase ozone at night, decrease ozone during the day

Green Car Congress

A study by researchers at the University of Texas found that in general, use of plug-in hybrid electric vehicles (PHEVs) can lead to an increase in ozone during nighttime hours (due to decreased scavenging from both vehicles and EGU stacks) and a decrease in ozone during daytime hours.

Ozone 218
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HEI launches two new non-tailpipe particulate emission studies

Green Car Congress

Research teams will also measure concentrations of exhaust pollutants in an attempt to disentangle non-tailpipe and tailpipe pollution, to better understand how each effects human health. Assessing the Impact of Non-exhaust Emissions from Traffic on the Asthmatic Airway (IONA) ,” led by Chris Griffiths, Queen Mary University of London.

Emissions 353
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Study uncovers role of longer-chain unburned hydrocarbon emissions from diesels in London air pollution; calls for regulatory shift

Green Car Congress

The study found that 60% of the winter primary hydrocarbon hydroxyl radical reactivity in London is from those diesel-related hydrocarbons; the authors predicted that the longer-chain HCs contribute up to 50 % of the ozone production potential in London.

London 150
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PSI team develops web tool for consumers to compare environmental impact of passenger cars in detail

Green Car Congress

Deterioration of the ozone layer [kg CFC-11-eq.]. Eutrophication of non-marine aquatic environments [kg N-eq.]. Eutrophication of non-marine aquatic environments [kg P-eq.]. Land occupation in an urban environment [m 2 / year]. Toxicity of marine aquatic environments [kg 1,4-DC-eq.]. Human toxicity [kg 1,4-DC-eq.].

Mariner 435
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Study finds significant slowdown in decrease of NOx emissions in US; implications for air quality management

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They found that levels of pollutants that can contribute to the formation of ground-level ozone, or smog, have failed to continue a fairly steady decline as estimated by the US Environmental Protection Agency. The findings have implications for air quality management. Slowdown in air quality improvement. —Zhe Jiang, lead author.

Emissions 150
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Why Schools Should Electrify Their Bus Fleets

Blink Charging

The transition away from gasoline and diesel vehicles to electric vehicles (EVs) is going full throttle in the United States, and that includes the iconic yellow school bus. As it turns out, the very gasoline or diesel vehicles children use to go to school hamper their learning.

Fleet 123
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Study Finds Controlling Soot May Be Fastest Method to Reduce Arctic Ice Loss and Global Warming; Second-Leading Cause of Global Warming After CO2

Green Car Congress

Jacobson used a computer model of global climate, air pollution and weather that he developed over the last 20 years and updated to include additional atmospheric processes to analyze how soot can heat clouds, snow and ice. 1990; Anisimov, 2007] and chemical production of ozone in already-polluted locations [Jacobson, 2008b].

Global 230