I'd like to point out that yes there is evidence of the possibly of catastrophic climate change. But we do not know enough to have any certainty on probability of catastrophe, we also don't know enough to be sure we could properly mitigate the current changes. Or that any mitigation will have a net positive effect on life on earth.

There are very dogmatic people involved in this argument that want to put in place very expensive measures to avoid a catastrophe but we have to be careful. We could drive our global economy into the ground if we go to far. The cost to the environment would be far worse. Industry gets very dirty when people go into survival mode. Clean technologies could alter the balance, but they're only going to get developed if we have the money to invest in them.