When Mount Pinataubo (sp?) erupted it put out 10,000 times the amount of fossil fuel emission gases that mankind has ever produced. Where was the calamity? Where was the failure of the Ozone layer? Greenhouse gases are heavier than air and cant damage the ozone. If any warming is occuring it is natural and probably beneficial since we will have more subtropical land. And saying 'the evidence is unimpeachable' is just blind faith in your point of view meaning your mind is made up and you dont want to be confused with facts.
"...but according to their own desires, because they have itching ears, they will heap up for themselves teachers; and they will turn their ears away from the truth, and be turned aside to fables"