The left has a lot to overcome for them to gain some credibility on the climate issue. One, had they not been running around in the 70's claiming the world was going to end by the end of the century, they might be taken more seriously today. Two, had they not been caught red handed cherry picking data they might have a stronger argument. Three, if their representation wasn't a bunch of do as I say, not as I do billionaire polluters, they might have a leg to stand on. Fourth, if they would actually address the modern day polluters instead of pissing and moaning about how bad America used to pollute, they...you get it. They're full of shit up to their ears and expext to be taken seriously.