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Researchers use satellite data to show vehicles are an under-recognized source of urban ammonia pollution

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By disrupting normal societal activities such as driving, COVID-19 lockdowns afforded a unique opportunity to study their impacts on the environment. On a national or global scale, most NH 3 pollution comes from agricultural sources, such as livestock manure. Bowman, Tzung-May Fu, and Muhammad O. 1c00730.

Pollution 321
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Study Measures Impact of Biodiesel on Non-Regulated Pollutants in Heavy-Duty Engine

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A team from the US National Renewable Energy Laboratory and the Colorado School of Mines has measured gas phase and particle-associated non-regulated pollutant emissions from a heavy-duty engine operating both with and without a catalyzed DPF and operating on biodiesel fuel. McCormick, and Kent J. Article ASAP doi: 10.1021/es1008032.

Pollution 210
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TOAR shows present-day global ozone distribution and trends relevant to health; public database

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Even so, during 2010-2014, people in parts of California, Arizona, Colorado, Texas, the Midwest and the Middle Atlantic still experienced more than 15 days a year in which ozone levels exceeded the US health-based air quality standard of 70 parts per billion (ppb) averaged over eight hours. Source: University of Leicester. Click to enlarge.

Ozone 255
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Researchers say policies to curb short-lived climate pollutants could yield major health benefits; methane and black carbon

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They also contribute to air pollution that harms the health of billions of people worldwide and reduces agricultural yields. Shindell, professor of climate science at Duke University’s Nicholas School of the Environment, co-authored the paper with colleagues from the Institute for Governance & Sustainable Development in Washington, D.C.;

Pollution 150
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NSF Funds Study to Investigate NOx and PM Formation Chemistry in Algae Biofuels

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Two Colorado State University (CSU) researchers have received a $325,000 National Science Foundation grant to determine the pollutant formation chemistry of algae-derived biofuels, which have potential to be high-yield, efficiently produced, renewable fuels. Are there going to be any consequences that we may not have thought about?

Pollution 186
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Study on Greenhouse Gas Emissions from Global Cities Highlights Importance of Geophysical and Technical Factors

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Timothy Hillman, University of Colorado. Miroslav Havránek, Charles University Environment Center. Anu Ramaswami, University of Colorado. The releases include carbon dioxide; air pollutants, sewage and other water pollutants; and even excess heat that collects in vast expanses of concrete pavement and stone buildings.

Emissions 199
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Modelling the Impact of PHEVs on Ozone in Denver

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Researchers at the University of Colorado, Boulder and the National Renewable Energy Laboratory (NREL) modeled the emissions impact had plug-in hybrid electric vehicles (PHEVs) replaced light duty gasoline vehicles in the Denver, Colorado area in summer 2006. For other areas, where PM2.5 Brinkman et al. Hannigan and Jana B.

Denver 170