Health cure environments
That forest bathing, meaning self-curing by means of forest air, works is proven by the fact that there are thousands of villages and towns in Switzerland, France and Germany (for instance, in the Black Forest, where they call themselves Kurorte, meaning cure places) that offer such cures (i.e. cleansing) and have done so since the middle of the 19th century. In these countries, forest bathing is a multi billion euro business.
So beneficial is forest bathing that health insurance companies, both private and public, pay for their sick clients to go there to recuperate.