There was a time where you couldn't see the San Gabriels from downtown Pasadena. Lol. We're not talking hundreds of miles either.
More recently, remember the changes that happened during the covid lockdown? Jellyfish returned to Venice. You could see across the street in Mumbai.
We live in a chemical soup. When I was a kid it was estimated that cancer would affect 1 in 4 families. Now it's more like 1 in 4 in every family.
Anyhow, the root problem is too many people. It will self correct. And it's going to be ugly. I am glad I lived in the most prosperous period in history and don't have to be part of the generation that will pick up the mess when the shtf.