USDA Forest Service, 5 Moon Library, SUNY-ESF, Syracuse, NY 13210, USA.
Environ Pollut. 2013 Jul;178:395-402. doi: 10.1016/j.envpol.2013.03.050. Epub 2013 Apr 25.
Urban particulate air pollution is a serious health issue. Trees within cities can remove fine particles from the atmosphere and consequently improve air quality and human health. Tree effects on PM2.5 concentrations and human health are modeled for 10 U.S. cities. The total amount of PM2.5 removed annually by trees varied from 4.7 tonnes in Syracuse to 64.5 tonnes in Atlanta, with annual values varying from $1.1 million in Syracuse to $60.1 million in New York City. Most of these values were from the effects of reducing human mortality. Mortality reductions were typically around 1 person yr(-1) per city, but were as high as 7.6 people yr(-1) in New York City. Average annual percent air quality improvement ranged between 0.05% in San Francisco and 0.24% in Atlanta. Understanding the impact of urban trees on air quality can lead to improved urban forest management strategies to sustain human health in cities.
城市颗粒物空气污染是一个严重的健康问题。城市中的树木可以从大气中去除细颗粒物，从而改善空气质量和人类健康。本文为 10 个美国城市的 PM2.5 浓度和人类健康对树木的影响建模。树木每年去除的 PM2.5 总量从锡拉丘兹的 4.7 吨到亚特兰大的 64.5 吨不等，每年的价值从锡拉丘兹的 110 万美元到纽约市的 6010 万美元不等。这些价值大多来自减少人类死亡率的影响。死亡率降低通常为每个城市 1 人 yr(-1)，但在纽约市高达 7.6 人 yr(-1)。空气质量年平均改善百分比在旧金山为 0.05%，在亚特兰大为 0.24%。了解城市树木对空气质量的影响可以制定出改善城市森林管理策略，以维持城市居民的健康。
