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Google圖書搜尋
Sustaining America's Urban Trees and Forests
David John Nowak
出版
United States Department of Agriculture, Forest Service, Northern Research Station
, 2010
URL
http://books.google.com.hk/books?id=Rcotsw5uz8sC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
Close to 80 percent of the U.S. population lives in urban areas and depends on the essential ecological, economic, and social benefits provided by urban trees and forests. However, the distribution of urban tree cover and the benefits of urban forests vary across the United States, as do the challenges of sustaining this important resource. As urban areas expand across the country, the importance of the benefits that urban forests provide, as well as the challenges to their conservation and maintenance, will increase. The purpose of this report is to provide an overview of the current status and benefits of America's urban forests, compare differences in urban forest canopy cover among regions, and discuss challenges facing urban forests and their implications for urban forest management.