Access to nature has been shown to improve sleep quality, decrease blood pleasure, and even lengthen lifespan. Large-scale studies conducted in the United States, Britain, and the Netherlands show that people living in greener areas have a lower incidence of anxiety and depression and display an ability to recover more quickly from stressful life events than those in less green areas. One possible reason is that spending time in nature decreases blood flow to a part of the brain called the subgenual prefrontal cortex, which is associated with the tendency to brood over problems. Natural settings literally make us more carefree.
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