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DTSTART:19700329T010000
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UID:838
SUMMARY:Street canyon vegetation very effectively improves urban air quality
DESCRIPTION:Street-level concentrations of nitrogen dioxide (NO2) and particulate matter (PM) exceed public health standards in many cities, causing increased mortality and morbidity. Concentrations can be reduced by controlling emissions, increasing dispersion, or increasing deposition rates, but little attention has been paid to the latter as a pollution control method. Both NO2 and PM are deposited onto surfaces at rates that vary according to the nature of the surface; deposition rates to vegetation are much higher than those to hard, built surfaces. Previously, city-scale studies have suggested that deposition to vegetation can make a very modest improvement improvement (
DTSTART:20120111T130000
DTEND:20120111T134500
LOCATION:LEC LG505
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