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Carnegie study finds climate impact of particulates varies greatly depending on where the pollution originated

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Error bars in b capture the standard error. However, aerosols have a much shorter lifespan in the atmosphere than the gases responsible for global warming, resulting in an atmospheric distribution that varies by region, especially in comparison to carbon dioxide. Persad and Caldeira. This work is part of a larger $1.5-million

Climate 170
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Study: US counties with higher PM2.5 concentrations have more stroke deaths

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Analyzing health data and pollution monitoring information from 1,561 counties across the United States between 2005 and 2010, researchers found the yearly average for fine air pollution ranged from 7.2 The higher the poverty rate and fewer health providers in a county, the greater the health impact of high pollution.

Pollution 207
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ACEEE report recommends steps toward international alignment of heavy-duty vehicle efficiency standards

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A new report published by the American Council for an Energy-Efficient Economy (ACEEE) recommends the international harmonization of fuel efficiency and/or greenhouse gas emissions standards for heavy-duty trucks and buses. This report explores whether and how heavy-duty standards programs could be better aligned across regions.

Standards 240
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Study finds some improved cookstoves may emit more black carbon pollution than traditional mud cookstoves

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The first real-world, head-to-head comparison of improved cookstoves (ICs) and traditional mud stoves has found that some ICs may at times emit more of the black carbon particles that are linked to serious health and environmental concerns than traditional mud stoves or open-cook fires.

Pollution 231
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Tsinghua University provincial-level lifecycle study finds fuel-cycle criteria pollutants of EVs in China could be up to 5x those of natural gas vehicles due to China’s coal-dominant power mix

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In February 2012, the China State Council approved its first national ambient air quality standard for PM 2.5 , which will come into effect by the end of 2015. Although EVs have a greater GHG reduction benefit than CNGVs, they may increase life-cycle emissions of criteria pollutants, simply because coal is heavily involved.

Coal 231
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Swiss team concludes that particulate filters should be mandatory for GDI engines

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Based on a three-year study of toxic and environmentally relevant pollutants from gasoline direct injection (GDI) engines, Swiss researchers have concluded that some GDI engines emit just as many soot particles as unfiltered diesel cars did in the past. Further, the GDI particles carry numerous carcinogenic substances.

Engine 271
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EPIC: state-level renewable electricity mandates increase electricity prices up to 17% over 12 years; cost more expensive than benefit

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As states take the lead in confronting climate change, a flagship policy is often Renewable Portfolio Standards (RPS). —co-author Michael Greenstone, the Milton Friedman Distinguished Service Professor in Economics and director of the Energy Policy Institute at the University of Chicago (EPIC).

Renewable 207