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Study: plant roadside hedges rather than trees to combat near-road pollution

Green Car Congress

Urban planners should plant hedges—or a combination of trees with hedges—rather than just relying on roadside trees if they are most effectively to reduce pollution exposure from cars in near-road environments, according to a new study from the University of Surrey. Atmospheric Environment doi: 10.1016/j.atmosenv.2018.12.036.

Pollution 354
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Study using satellite data finds rate of urban growth much greater than previously thought

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An international team of researchers has used satellite images to map urban growth between 1985 and 2015. Each image captured 900 square meters of ground, a level of detail that allowed the scientists to study land-use change over time. Urban area dynamics during 1985–2015 at the global and continent scales.

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Tsinghua study finds China’s actions have cut PM2.5 concentrations 21.5% from 2013-2015; PM2.5-related mortality down 9.1%

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China’s measures to improve its air quality are working, but more stringent policies should be put in place to safeguard public health, according to a new open-access study by researchers at Tsinghua University published in the journal Environmental Research Letters. This study estimated that the premature mortality related to PM 2.5

2013 186
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Study finds association between air pollution, coronary atherosclerosis in Chinese population

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Spatial Distribution of Estimated Annual Pollution Concentrations in 2015 in China. The study was conducted on 8,867 Chinese adults aged 25 to 92. The study centered on levels of nitrogen dioxide and PM 2.5. In 2015, more than 95% of the Chinese population was exposed to concentrations of PM 2.5 m (PM 2.5 ) per 1?×?1

Pollution 320
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U Toronto study measures GDI emissions in urban near-road environment

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A study of emissions from gasoline direct injection (GDI) vehicles in an urban near-road environment in Toronto over a wide range of weather conditions (February 2014 to January 2015) found that—other than for NO x and CO—the GDI engines had elevated emissions compared to the Toronto fleet. —Zimmerman et al.

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Study: traffic density, wind and air stratification influence concentrations of NO2

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However, weather also has an influence on NO 2 concentrations, according to a study by the Leibniz Institute for Tropospheric Research (TROPOS), which evaluated the influence of weather conditions on nitrogen dioxide concentrations in Saxony 2015 to 2018 on behalf of the Saxon State Office for Environment, Agriculture and Geology (LfULG).

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Global study links daily exposure to ozone pollution to increased risk of death

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Daily exposure to ground level ozone in cities worldwide is associated with an increased risk of death, according to the largest study of its kind, published in an open-access paper in The BMJ. Ground level ozone is a highly reactive gas commonly found in urban and suburban environments, formed when pollutants react in sunlight.

Ozone 243