Okay I’ll bite. What happens to the ground???
The fact that you don’t hear anything about it would be a clue it isn’t good.
Without looking, it’s pretty obvious the surface doesn’t get much sun. So you do not develop good groudcover - grasses, shrubs, etc. This leads to erosion, since the rain doesn’t stop. This isn’t good for the local streams and rivers, they’re going to fill in.
That’s just off the top of my head, and I’m just a dumb old engineer, not a farmer or biologist or horticulturalist or forester.
Redistribution of moisture, runoff, erosion, pollution (cadmium telluride)...