Per The Daring Dufas:
What about the ozone layer thing? Granted it wasn't weather, but
AFIK, it was heading for "overall of the planet" until countries got
together and limited the release of something-or-other (freon?).

Another study done my scientists, who were not paid off, determined that
volcanoes were responsible for the majority of chlorine spewed into the
atmosphere. There are those arrogant, deranged humans again. o_O

But the holes in the ozone layer closed up after freon(?) use was cut
back - yet volcanic activity remained the same, right?
--
Pete Cresswell