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For the first time, the NYC Parks and Recreation Department has calculated the cost and benefit of the city?EUR??,,????'?????<????????????EUR??,,??s trees in a quantitative dollar amount. The project began with a two-year long tree census in which 1,000 volunteers counted every tree on every street in the city. Then, the figures were inputed into a computer program, Stratus, developed by researchers at the University of California Davis and the United States Forest Service. Of the 592,130 trees counted (not including the 4.5 million trees in parks and private property) the study concluded that the city receives $5.60 in benefits for every dollar spent on trees. The program analyzed several factors, including impact on property values, contribution to cleaning air through carbon dioxide absorption, water drainage, and energy conservation through shade. Some other results that were found were that trees in lower-density areas are generally more valuable than those in high-density areas because they provide the greatest environmental benefits. Trees with large leaves, like maple trees, are more valuable because they provide more shade and absorb more carbon dioxide. Dr. Greg McPherson, lead designer of the Stratus program and director of the Forest Service?EUR??,,????'?????<????????????EUR??,,??s Center for Urban Forest Research said he developed his computer program over the last 25 years by building on years of economic research. ?EUR??,,????'?????<????????I hope this model provides ammunition for people on the front lines who have to battle for budgets to maintain their trees and expand their urban forests,?EUR??,,????'?????<???????? he said. Source: New York Times |