I don't see it as a stretch to expect that we can go further in a given direction by dedicating resources to accomplish it, compared to what might happen accide

I don't see it as a stretch to expect that we can go further in a given direction by dedicating resources to accomplish it, compared to what might happen accidentally by chance. That's not to say that such a thing is without danger. I'm particularly wary of unintended consequences. But the people that are pursuing vast reductions in emissions aren't giving very much thought to the unintended consequences of their approach, either. My point is that the arguments are being made with a huge amount of assumption on all sides. That's not the way to get to a good answer. We need to really consider what the likelihoods of possible outcomes are, in terms of lost human utility; and we might be able to do about them, including their costs and likelihood of success. I don't see a lot of real pro-vs-con debate - most of what I see is the Al Gore tactic of intentionally exaggerating claims to frighten people into acquiescence.