Paul Krugman gives his explanation of why people choose not to act despite data showing risk.

So it wasn’t the science, the scientists, or the economics that killed action on climate change. What was it?

The answer is, the usual suspects: greed and cowardice.

If you want to understand opposition to climate action, follow the money. The economy as a whole wouldn’t be significantly hurt if we put a price on carbon, but certain industries — above all, the coal and oil industries — would. And those industries have mounted a huge disinformation campaign to protect their bottom lines.

Thomas Friedman gives a very concrete security example in his analysis of the American paralysis to regulate the coal and oil industries.

Making our country more energy efficient is not some green feel-good thing. Retired Brig. Gen. Steve Anderson, who was Gen. David Petraeus’s senior logistician in Iraq, e-mailed to say that “over 1,000 Americans have been killed in Iraq and Afghanistan hauling fuel to air-condition tents and buildings. If our military would simply insulate their structures, it would save billions of dollars and, more importantly, save lives of truck drivers and escorts. … And will take lots of big fuel trucks (a k a Taliban Targets) off the road, expediting the end of the conflict.”

Friedman then comes to the same conclusion as Krugman

I have a much simpler but plausible ‘conspiracy theory’: the fossil energy companies, driven by the need to protect hundreds of billions of dollars of profits, encourage obfuscation of the inconvenient scientific results. I, for one, admire them for their P.R. skills, while wondering, as always: “Have they no grandchildren?”