One of the greatest upsides of modern society is hygiene. But taken from a more metaphorical perspective, think about mental hygiene, social hygiene, and of course the practical physical hygiene aspect.
Ironically enough, being outdoors, being in nature, although dirtier, and more dusty, it is actually more hygienic. Also being in the direct sun is the most hygienic. One thing that Asian people figured out is that the best way to disinfect something is just put it outside in the direct sun, and the sun will deodorize and sanitize it.