RE: Do we still have to worry about the hole in the ozone layer?
Although I wrote this article using several references, these are the links you can see for the curation.
The Montreal Protocol Is Healing Earth’s Ozone Hole
Saving the ozone layer: why the Montreal Protocol worked
Saving the Earth's Ozone Layer Went Even Better Than Expected
RE: Do we still have to worry about the hole in the ozone layer?