According to Al Gore, we passed the point of no return last year. Every time we get to the point of no return, it simply passes. No one knows how any of this happens. All climate models rely on the action of water molecules to amplify the actions of the CO2 emmissions. The problem is, they have never been able to determine if such a relationship really exists and to what extent it amplifies the CO2. Remember the hole in the ozone? That was supposed to kill us all 15 years ago. Remember when the Earth was COOLING too much? Remember when we were all going to stave when there were 4 billion earthlings? Stupid people.