The story: https://www.sciencealert.com/daycares-in-finland-built-a-forest-and-it-changed-kids-immune-systems
My takeaway from this article is that ultimately, we humans are animals. Like it or not, biologically, we are animals. And as animals, we belong in Nature.
So as smart or intelligent as we always claim to be, building concrete jungles to live in probably wasn’t exactly the wisest thing we humans did for ourselves, wasn’t it?
We would all have been better off living in the jungle as our ancestors did. Sure, lifespan could be shorter, but we’d all probably be healthier. Maybe even happier. But definitely healthier!