Yes, thank you ACs, we still know squat all about the ozone hole, except that it has mysteriously disappeared, something you are causally linking to some minor human action, which was to take decades to be implemented and play out. Maybe it went away because of forces greater than the human activity of the western hemisphere?
The same could be said of global warming. While CO2 is increasing, temperatures are decreasing globally, and northern polar ice is growing. Glaciers aren't melting, and Antarctic ice isn't shrinking one foot. There is well proven and documented research that shows temperature increase as correlating to CO2 concentration increase. We could roll back CO2 concentrations to pre-industrial levels, and that would reduce global temperatures less than .5 degrees. The thing with CO2 all the alarmists are missing is that it has very rapidly diminishing effects the more of it you stack. We could add twice as much as is there already and you would barely be pick out the temp difference form the noise. Maybe something else is at work here, hmm? I'm looking at that big fiery ball in the sky, the source of nearly 100% of the heat input into the planet.
I could have also thrown in there acid rain, and how all our buildings and trees would melt one day because of it. Although it was certainly a measurable problem, like global cooling, ozone hole, global warming, and unlike them was almost entirely attributable to human activity, however the dire predictions were again simply hysteric and wildly exaggerated, making a mockery of the whole thing, and confusing the issues.
We have enough problems on this planet that we don't need to make up new ones to spend money on. There is real air, water and ground pollution happening all over the place. It is much more immediate and much more dangerous to the environment and humans than any fantasy we've come up with to date. Except we don't need a world government and oppressive regulations regime to solve them, and it's not sexy like polar bears and going green, so no go on that front.