The Nature Cure Why some doctors are writing prescriptions for time outdoors

The Growing Field of Ecotherapy - The Atlantic:

But other research, conducted with actual humans, does support the idea that spending time in nature makes people healthier. Children with ADHD who regularly play in parks have been found to have milder symptoms than those who spend more time indoors, for example, and therapeutic-camping programs have been found to decrease relapse rates in substance addicts. Such findings generally have more to do with mood and behavior than basic biology—but mood and behavior are intimately tied to physical well-being. Social connection, for instance, is one of the most important factors in human health. And communal green spaces foster that.