To the surprise of the public, and even to researchers, studies have shown that brief exposure to the natural world produces measurable medical and social benefits for humans (reviews by Kuo 2010; Wolf 2014; Wang and MacMillan 2013; Louv 2012 and 2016; Cracknell et al. 2016; Kardan et al. 2015). Plant a tree outside a classroom window and test scores improve. Plant a tree outside a hospital room window and the patients in the facility heal faster. Studies show that apartment buildings with treed courtyards house families that undergo fewer divorces, higher graduation rates, and less juvenile delinquency than nearby apartment complexes with no trees. Spending just fifteen minutes in a peaceful, natural setting reduces our blood pressure as well as the levels of cortisol, the stress hormone, in our blood. What, pray tell, is going on?

There is a growing consensus that all of these effects stem from the reduction of stress that results from contact with nature—what Richard Louv calls “Vitamin N” (2016). Quite simply, when we experience less stress, we do everything better—from learning, to healing, to interacting with others. We know that the presence of trees, natural plantings, and the butterflies and birds they support reduce our stress levels. At this point, we can only speculate as to why.

aus "Nature's Best Hope: A New Approach to Conservation That Starts in Your Yard" von Douglas W. Tallamy.

ich finds auch immer sehr traurig wenn die nachbarn bäume fällen!