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    Overall, city trees reduce particulate matter and provide substantial health benefits; but under certain conditions, they can locally increase particulate matter concentrations. Urban foresters need to understand how trees affect particulate matter so they can select proper species and create appropriate designs to improve air quality. This article details trees' effects on particulate matter and provides recommendations for urban foresters to improve air quality.

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    Nowak, David J. 2014. Urban tree effects on fine particulate matter and human health. Arborist News. April 2014: 64 -67.

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