By Seth Borenstein, AP Science Writer
With climate change, plastic pollution and a potential sixth mass extinction, humanity has made some incredible messes in the world.
But when people, political factions and nations have pulled together, they have also cleaned up some of those human-caused environmental problems, including healing the ozone hole, clearing perpetually smoggy air and saving many species from the brink of extinction.
Great Lakes Now
https://www.greatlakesnow.org/2022/04/ap-healing-ozone-hole-smog-eagles/