Reminds me of the hypothesis by the Kaplan’s, Restoration Attention Theory. Modern life drains our attention and mental energy because it requires direct focus whilst organic situations, like watching clouds, tree’s and plants move in the wind require no direct attention and allow us to recharge our mental energy. I believe there was a study done recently using portable EEG machines which essentially proves what should be fairly obvious, that green spaces cause a reduction in stress and tension whilst urban spaces do the opposite.
Having grown up in leafy surrey with it’s royal parks and ample green spaces it was a right shock moving to central london where all I could see out my window was one tree with a tesco shopping bag caught in its branches!