02 Mar '12, 6am

Trees Losing Ground in Cities Across the U.S.

Trees Losing Ground in Cities Across the U.S.

Before high-rise office buildings and multi-storied apartments began sprouting up in urban centers across the United States, the tallest structures there were often trees -- stalwart vestiges of a terrain yet untamed. But now, with cities becoming ever more crowded with people and concrete, those urban trees are losing ground at an alarming rate. According to a recent study conducted by the U.S. Forest Service , some 4 million trees are disappearing from urban areas in the U.S. each year, victims of expanding swaths of pavement and rooftops. After examining forest coverage in 20 metropolitan areas, researchers determined that nearly all were shedding trees, and most were replacing them with impervious cover, dimming hopes they would be recovered. The USDA breaks down the worst offenders: Of the 20 cities analyzed, the greatest percentage of annual loss in tree cover occurr...

Full article: http://www.treehugger.com/natural-sciences/more-4-million...

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