Research reveals that environments can increase or reduce our stress, which in turn impacts our bodies. What you are seeing, hearing, experiencing at any moment is changing not only your mood, but how your nervous, endocrine, and immune systems are working.
The stress of an unpleasant environment can cause you to feel anxious, or sad, or helpless. This in turn elevates your blood pressure, heart rate, and muscle tension and suppresses your immune system. A pleasing environment reverses that.
And regardless of age or culture, humans find nature pleasing. In one study cited in the book Healing Gardens, researchers found that more than two-thirds of people choose a natural setting to retreat to when stressed.


Terry was suffering from one of the most powerful bouts of depression in his life. His therapist chose an unconventional treatment and sent Terry to his farm, located several miles outside city limits.
At fifty, James was beginning to feel the effects of working sixty hours a week, rarely exercising, and eating lunch at his desk. He was overweight, had high blood pressure, and always felt tired. On the advice of his doctor, James began a green exercise program with a local community group that walked through the countryside on Saturdays.