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.…

[After publication of my New York Times Op-ed on peak oil, Joseph Romm posted a response—and a challenge—on his website, and later expanded it on The Huffington Post. Below is Michael Lynch’s response.]

Thank you very much for your invitation to a wager on the price of oil, Joe, which I take to be serious, even though you made no effort to convey the wager to me personally. (If you were simply making a “‘pr” effort, feel free to withdraw it.) I would warn you that for most of my career I have been referred to as a ‘heretic’ or ‘contrarian’ and have repeatedly outperformed other forecasters by explaining (in a number of academic publications) why the forecasting of oil price and supply has been so deficient. That you appear to have been more prescient than me no doubt gives you confidence.…

[Editor: This MasterResource post from July is reprinted given the ‘war on coal’ strategy by environmental groups and certain activist strands of the upstream natural gas industry, led by Chesapeake Energy (Aubrey McClendon.]

Robert F. Kennedy Jr., president of Waterkeeper Alliance, posits in the Financial Times (July 19) that converting our fleet of coal-fired power plants to natural gas could be accomplished “practically overnight” and will have the effect of “jump-starting our economy….without the expense of building new power plants.” Thus did Kennedy express his new-found love of natural gas: It’s our “bridge fuel to the ‘new’ energy economy.” (Where have we heard that before–wasn’t that Enron’s tag line decade or two ago?)

Yet Kennedy’s proposal ignores the extremely high cost of fuel conversion (upwards of $100 million for a medium-size coal plant) and the added fuel cost to burn gas.…