[licker]

In a vacuum adding more CO2 traps more heat. However, we all realize that there are a whole host of interdepandancies and feedback mechanisms that we do not fully understand (and some we likely are not even aware of yet).

I'm not disagreeing that we should seek to curb CO2 emissions (though for necessarily AGW reasons), I am pointing out that the science on this matter is not in fact concluded (this presuposes that science is ever truly concluded, but that's more of a philosophical debate).

But to look at this from another point (not one I agree with necessarily), if, even with emission curbs, because no one is seriously talking about zero emission, how do we actually reverse the growth of CO2 in the system?

This is why I asked jim about tipping points, and why it's important to consider the difference between mitigation and adaptation as policies, rather than elimination as the policy.