A study by the U.S. Forest Service found that trees in Tennessee’s urban areas provide the state with environmental benefits valued at nearly $640 million each year. Tennessee is only the second state where the Forest Service has surveyed urban trees The study is meant to set a baseline for measuring the future health of the state’s urban forest. For more information: http://www.knoxnews.com/news/2012/mar/26/states-urban-forest-provides-640m-in-benefits/