The argument is full of holes. If this is the best Friedman can do, he needs to stop writing.
Friedman likens anthropogenic global warming (AGW) legislation to Cheney's argument; citizens should commission a vast global redistribution of trillions of dollars with questionable measurement without the benefit of the world's largest 'polluters' (destroying any guarantee of a positive result) against a distant fear of calamity which by IPCC predictions becomes less dire with every iterative model. The fallacy of comparing the two arguments is clear to any fifth grader. I critique his whole argument on my website.