I don’t know where a fact could be generated anymore, certainly not something involving politics and money. I do know for a fact that the predictions are based on models, created by men with aspirations. Models are guesses predicting what will happen, so there can be no level of certainty the outcome will match the model.
It’s not like all the naysayers are all a bunch of hacks. Look at this list. http://en.wikipedia.org/wiki/List_of_scientists_opposing_the_mainstream_scientific_assessment_of_global_warming
I know what you mean and as soon as politics and along with it money gets involved you are instantly in muddy waters.
While I think it is good to believe it is man made in any case (because then maybe more people would treat their environment more responsibly) at the end of the day why global warming happens doesn’t change that it seems to happen and I want to be prepared for that.
Alea iacta est ("The die has been cast")