Robert Hoehn

Modeled PM2.5 removal by trees in ten U.S. cities and associated health effects.

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

Assessing urban forest effects and values, Minneapolis' urban forest

1.1 million in Syracuse to

Assessing urban forest effects and values, Chicago's urban forest

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.

Assessing urban forest effects and values, Washington, D.C.'s urban forest

An analysis of trees in Minneapolis, MN, reveals that the city has about 979,000 trees with canopies that cover 26.4 percent of the area. The most common tree species are green ash, American elm, and boxelder. The urban forest currently stores about 250,000 tons of carbon valued at

Assessing urban forest effects and values: Toronto's urban forest

4.6 million. In addition, these trees remove about 8,900 tons of carbon per year (

Urban trees and forests of the Chicago region

164,000 per year) and trees and shrubs combined remove about 384 tons of air pollution per year (

Urban forest assessment in northern Delaware

1.9 million per year). The structural, or compensatory, value is estimated at

Assessing urban forest effects and values, Scranton's urban forest

756 million. Information on the structure and functions of the urban forest can be used to improve and augment support for urban forest management programs and to integrate urban forests within plans to improve environmental quality in the Minneapolis area.

Austin's Urban Forest, 2014

An analysis of trees in Chicago, IL, reveals that this city has about 3,585,000 trees with canopies that cover 17.2 percent of the area. The most common tree species are white ash, mulberry species, green ash, and tree-of-heaven. Chicagos urban forest currently stores about 716,000 tons of carbon valued at

Assessing urban forest effects and values: Morgantown's Urban Forest

14.8 million. In addition, these trees remove about 25,200 tons of carbon per year (