![]() Urban forests can remove multiple tons of ozone, gaseous air pollution, and particulate matter each year either through direct uptake of gasses or temporarily intercepting airborne particles. Trees can improve air quality through a number of means, including by (1) reducing air temperature thus altering pollution concentrations, (2) reducing energy consumption in buildings, which consequently reduces air pollutant emissions from the power sources, and most notably, (3) directly removing pollutants from the air. The trees in NPS’s urban forests contribute to improved air quality. The National Park Service monitors and assesses air quality in park units. It can lead to decreased human health, damage to landscape materials and ecosystem processes, and spoiled scenic views due to reduced visibility. There really is an otherworldly threat out in the woods.Poor air quality is a common problem in many urban areas.
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