From the time he wrote 'Walden -- Life in the Woods' philosopher Henry David Thoreau understood the restorative value of trees to the human soul. More than 100 years later researchers are discovering that a pleasurable walk among trees and green space can calm an active child, refresh a tired mind, and make all of us feel better. The view of a tree outside a window can make an office worker more productive, a hospital stay shorter, or a prison sentence more bearable. Even in the most deprived inner city, trees and green space around buildings reduce crime and violence as well as promote a sense of community and well-being. Producer Jean Snedegar explores the power of trees to restore us, body and mind.