But that's my point, no one can provide factual evidence to back up either side, even peer reviewed literature is based on conjecture. We all know CO2is a greenhouse gas and we know its capabilities for warming, what we don't know is how much and how positive and negative feedbacks counteract this warming. Just by presenting peer reviewed literature doesn't make it a case of "I told you so", on the contrary most just pose more questions as we have to believe that some number crunching computer model can predict future temp rises whilst completely ignoring that what we don't fully understand. This is where bad PR starts from, not from misguided journalism but scientists beliefs that climate models can map an accurate forecasts in the future. More uncertainties need to be voiced and less arrogance in outcomes need to be addressed. Apologies, I was just about to post a reply stating the above as a quick google search brought up the relevant information.