"If we learned that Al Qaeda was secretly developing a new terrorist technique that could disrupt water supplies around the globe, force tens of millions from their homes and potentially endanger our entire planet, we would be aroused into a frenzy and deploy every possible asset to neutralize the threat"

"Critics scoff that the scientific debate [about global warming] is continuing, that the consequences are uncertain - and they're right... In the same way, terror experts aren't sure about the magnitude and timing of Al Qaeda's next strike.  But it would be myopic to shrug that because there's uncertainty about the risks, we shouldn't act vigorously to confront them - yet that's our national policy toward climate change, and it's a disgrace."

Unfortunately, you have to pay for the on-line link to the NYT article, or I would post.  But Giuliani's position suggests that the political heuristic deserves more attention.