The amount of research on this is legion. It matters not a smidgen what is presented in any film.
Whether or not global warming is going to affect our current image of the world deserves the same consideration and discussion as topics such as Is the Earth older than 6500 years?, How do seashells end up on top of mountains?, and Flat or Round ... you decide.
What to do about it is another matter.
So MIT scientists/ professors, etc that specializes in this field is not worth a damn "smidgen" as well, huh? Why do people judge things without even watching it 1st, it's akin to dismissing/ praising a iem or headphone cuz you read what others said/ wrote about it without ever trying it/ owning it yourself.
Exactly so can that so called carbon tax/ credit system do ANYTHING to curtail CO2 emissions if countries such as China is not held up to it??? And rich countries/ corporations can basically buy their rights to pollute from poorer/ less industrialized nations, hence further stagnating their industrial development??? Something is not right here, seems more like a pyramid scheme to me. Folks austerity measures are not fun and is nothing to look forward to, just look a nations such as Iceland and Greece today.