There are studies you can find about it, for example: https://pmc.ncbi.nlm.nih.gov/articles/PMC11211751/ https://pmc.ncbi.nlm.nih.gov/articles/PMC11211751/ The

There are studies you can find about it, for example: https://pmc.ncbi.nlm.nih.gov/articles/PMC11211751/ https://pmc.ncbi.nlm.nih.gov/articles/PMC11211751/ The simple way to understand it is exposure to nature activates some internal mechanisms that evolved with us through millions of years of species living in nature. In a similar manner it feels so good to go to a beach on a sunny day - you have exposure to earth, water, sun and wind.