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E-Mail Software to help towns and cities use street-planting to reduce citizens exposure to air pollution has been developed by researchers at the University of Birmingham. Street planting, or green infrastructure , is an essential part of the urban realm, but there is a misconception that plants remove or soak up a lot of pollution. Instead, planting at this scale primarily serves to redistribute pollution by changing air currents within streets and beside open roads. Because of this, not only the position and amount of planting within a street, but also the layout and orientation of that street, are critical to its impacts on local air quality. ....
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Abstract Urban street canyons formed by high-rise buildings restrict the dispersion of vehicle emissions, which pose severe health risks to the public by aggravating roadside air quality. However, this issue is often overlooked in city planning. This paper reviews the mechanisms controlling vehicle emission dispersion in urban street canyons and the strategies for managing roadside air pollution. Studies have shown that air pollution hotspots are not all attributed to heavy traffic and proper urban design can mitigate air pollution. The key factors include traffic conditions, canyon geometry, weather conditions and chemical reactions. Two categories of mitigation strategies are identified, namely traffic interventions and city planning. Popular traffic interventions for street canyons include low emission zones and congestion charges which can moderately improve roadside air quality. In comparison, city planning in terms of building geometry can significantly promote pollutant ....