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EPA proposes new heavy-duty truck emissions rules

Green Car Congress

The proposed multi-pollutant rule would further reduce air pollution from heavy-duty engines and vehicles across the United States, including ozone and particulate matter (PM). In addition, as part of this rulemaking, EPA is proposing targeted updates to the existing Heavy-Duty Greenhouse Gas Emissions Phase 2 program (HD GHG Phase 2).

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Satellite data show resurgence in NO2 emissions over China

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Data from the ESA’s Tropomi (TROPOspheric Monitoring) instrument on board the Copernicus Sentinel-5P satellite shows the variation of nitrogen dioxide (NO 2 ) emissions over China from December to March. The drop in emissions also coincided with Lunar New Year celebrations, which usually sees a similar drop in emissions each year.

Emissions 473
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Study: 2/3 of aviation climate impact due to emissions other than CO2

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of the human-made climate impact; two-thirds of this impact are caused by emissions other than CO 2 , according to a new study by researchers in Europe and the US. This new study is based on a thorough review of a decade of research on aviation emissions. The formation and emission of sulfate aerosol yields a negative (cooling) term.

Climate 448
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UNEP study: small number of measures targeting black carbon and tropospheric ozone could yield immediate climate benefits

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Black carbon and tropospheric ozone are harmful air pollutants that also contribute to climate change. Black carbon and tropospheric ozone are harmful air pollutants that also contribute to climate change. The identified measures complement, but do not replace, anticipated carbon dioxide reduction measures.

Ozone 218
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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%. At the same time, nitric oxide and carbon monoxide concentrations tended to go up. 3 , respectively, being 2.7

Ozone 316
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Texas study finds PHEV use could increase ozone at night, decrease ozone during the day

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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. The results are less clear in Dallas and Houston.

Ozone 218
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Obama Administration withdraws proposed rulemaking on strengthened ozone standards

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In a statement released this morning, President Barack Obama said he has requested that US Environmental Protection Agency (EPA) Administrator Lisa Jackson withdraw the agency’s draft Ozone National Ambient Air Quality Standards (NAAQS) rulemaking. Earlier post.) National Ambient Air Quality Standards (NAAQS).

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