Heh, political posturing and public opinion have never been the basis of good decision making. (I'm NOT a proponent of AGW, personally I think it's based on hysteria more than science)
At any rate, good decision making needs to be done after collecting evidence. It's much like in a civil court, the verdict is not reached until after all available evidence has been presented and discussed.
The reality though is that often politics is less about making good decisions and more about decisions that benefit the politicians. This is something that some of the comics have nailed perfectly.