A powerful argument against climate alarmism is the failed worldview of modern neo-Malthusianism, which has promoted fear after fear with an intolerant, smartest-guys-in-the-room mentality. Remember the “population bomb” where many millions would die in food riots? Well, obesity turned out to be the real problem.

Remember the Club of Rome’s resource scare? In 1972, 57 predictions of exhaustion were made regarding 19 different minerals. All either have been falsified or will be.

Remember the global-cooling scare promoted by, among others, the Obama administration’s science czar, John Holdren? (Yes, global cooling was a big deal, although it was not a “consensus.”)

And all of the above doom merchants were uber-confident and still are loath to admit they were ever wrong. Holdren, for example, is sticking to his prediction that as many as one billion people could die by 2020 from (man-made) climate change.…

My ‘Left’ friends are mad at me now that the climate debate/ discussion has shifted, at least temporarily, from Save the World to Why Did We Fail? Here is what a former Enron executive (his name will remain confidential) emailed me a few days ago:

Rob- shame on you. The [Breakthrough Institute] article [Apocalypse Fatigue: Losing the Public on Climate Change] names only 3 reasons why the U.S. will not address climate mitigation: far off threat, greed, and telling them what they don’t want to hear. It ignores the real reason: the constant effort from people like yourself to undermine the case for action with its ancillary affect of dividing the country and paralyzing the system.

Then the sarcasm comes in:

I am not being facetious: you should pat yourself on that back for helping create an atmosphere that will prevent any meaningful action on the false threat of climate change from happening in this country.

Two years ago, in Scenes from the Climate Inquisition, my colleague Steve Hayward and I observed that climate alarmists were growing ever more incendiary in their criticism of people who disagree with them. And these disagreements were not simply about the science, but about the favored policy choices of leftist environmentalists, many of whom had no training in public policy or economics.  As we wrote:

Anyone who does not sign up 100 percent behind the catastrophic scenario is deemed a “climate change denier.” Distinguished climatologist Ellen Goodman spelled out the implication in her widely syndicated newspaper column last week: “Let’s just say that global warming deniers are now on a par with Holocaust deniers.” One environmental writer suggested last fall that there should someday be Nuremberg Trials–or at the very least a South African-style Truth and Reconciliation Commission–for climate skeptics who have blocked the planet’s salvation.

One of the ugliest battles in the blogosphere climate wars has involved the newly released Superfreakonomics, sequel to the best-selling Freakonomics. In the new book’s final chapter (available here in pdf), economist Steven Levitt and journalist Stephen Dubner set out to challenge the view that massively restricting carbon emissions is the only hope for averting planetwide catastrophe.

In this post I will link to some of the major commentary on the book so far, and then focus on U.C. Berkeley economist Brad DeLong’s specific claims that Levitt and Dubner’s arguments in support of geoengineering are somehow “bad economics.” As we’ll see, Levitt and Dubner might be wrong, but if so they are wrong because of the numbers. DeLong is painting their views as self-evidently absurd, but that’s only because he himself is overlooking a basic economic point.…