Climate, Geoengineering, and Revealed Preferences

Glenn Reynolds has said of the climate change debate what I say about any number of issues: I'll believe it's a crisis when they start acting like it's a crisis.

In the Wall Street Journal, Bret Stephens looks at people's response to suggestions on dealing with a warming earth inFreaked Out Over SuperFreakonomics - WSJ.com.

Suppose for a minute—which is about 59 seconds too long, but that's for another column—that global warming poses an imminent threat to the survival of our species. Suppose, too, that the best solution involves a helium balloon, several miles of garden hose and a harmless stream of sulfur dioxide being pumped into the upper atmosphere, all at a cost of a single F-22 fighter jet.

Good news, right? Maybe, but not if you're Al Gore or one of his little helpers.

No, a cheap, easy solution that doesn't disrupt society or the economy just won't do it for them.

But when it comes to the religion of global warming—the First Commandment of which is Thou Shalt Not Call It A Religion—Messrs. Levitt and Dubner are grievous sinners. They point out that belching, flatulent cows are adding more greenhouse gases to the atmosphere than all SUVs combined. They note that sea levels will probably not rise much more than 18 inches by 2100, "less than the twice-daily tidal variation in most coastal locations." They observe that "not only is carbon plainly not poisonous, but changes in carbon-dioxide levels don't necessarily mirror human activity." They quote Mr. Myhrvold as saying that Mr. Gore's doomsday scenarios "don't have any basis in physical reality in any reasonable time frame."

More subversively, they suggest that climatologists, like everyone else, respond to incentives in a way that shapes their conclusions. "The economic reality of research funding, rather than a disinterested and uncoordinated scientific consensus, leads the [climate] models to approximately match one another." In other words, the herd-of-independent-minds phenomenon happens to scientists too and isn't the sole province of painters, politicians and news anchors.

But perhaps their biggest sin, which is also the central point of the chapter, is pointing out that seemingly insurmountable problems often have cheap and simple solutions. Hence world hunger was largely conquered not by a massive effort at population control, but by the development of new and sturdier strains of wheat and rice. Hence infection and mortality rates in hospitals declined dramatically as doctors began to appreciate the need to wash their hands.

A drowning man, it's said, will clutch at any straw. If we were really drowning in global warming, it seems to me the experts would grasp at any possible solution. Instead, it seems as if the experts are drowning in human prosperity, and are grasping at climate change in order to "solve" the problem of too much prosperity.