I suppose a strong case could be made that the banning of CFC has accelerated global warming.
A recent study has concluded that our increased use of fuel efficient vehicles, unleaded gasoline, and other technological improvements to reduce pollution have cleaned the air so much that far more of the suns energy is reaching the earths surface, accelerating global warming.
What we need to do is mandate that everyone drive muscle cars that run on leaded gas without catalytic converters and remove scrubbers from smoke stakes to save the planet!
I don't know if CFCs had much of an effect. As you may know, there are indications that "cleaner air" (i.e., less SO2 and soot) is allowing an more rapid surface warming. So the case could be made that reducing acid rain contributes to global warming.
All we really need is a several centuries long period of flood basalt volcanism. But I wouldn't want to live near where it was happening:
"All we really need is a several-centuries long period of flood basalt volcanism. But I wouldn't want to live near where it was happening":
