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  1. Chicago's urban forest ecosystem: results of the Chicago Urban Forest Climate Project

    Results of the 3-year Chicago Urban Forest Climate Project indicate that there are an estimated 50.8 million trees in the Chicago area of Cook and DuPage Counties; 66 percent of these trees rated in good or excellent condition. During 1991, trees in the Chicago area removed an estimated 6,145 tons of air pollutants, providing air cleansing valued at $9.2 million...

    Author(s):
    Gregory E. McPherson; David J. Nowak; Rowan A. Rowntree
    Year:
    1994
    Keywords:
    urban climate, air pollution, urban forestry, energy conservation, carbon dioxide, urban ecosystem
    Source:
    Gen. Tech. Rep. NE-186. Radnor, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 201 p.
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https://www.fs.usda.gov/treesearch/search?keywords=%22city%20trees%22&f%5B0%5D=station_historical_full%3A%22Southern%20Research%20Station%22&f%5B1%5D=station_historical_full%3A%22Northeastern%20Research%20Station%22&f%5B2%5D=author_facet%3A%22Nowak%2C%20David%22&f%5B3%5D=year%3A%221994%22&f%5B4%5D=type_description%3A%22General%20Technical%20Report%20%28GTR%29%22