Time for some cheering!!! We managed the ozon holes!

Easy to forget - worth mentioning!
Some 15 years ago, the ozon layers were a great concern.
With prompt actions, we did it!
The scientific evidences were very clear - are they as clear today?
I am not denying the problems we foresee - but are we totally clear
on the causes? Now, one may say "better safe than sorry" - but some
actions will be costly - often on the behalf of poor people and countries.

What's your opinion?