The Freakonomics Radio podcast remains No. 1 on iTunes; it’s also available for download via RSS. Elsewhere, the Energy Collective blog recently cited SuperFreakonomics in wondering whether the use of geoengineering to reverse climate change is “inevitable.” Meanwhile, Freakonomics and SuperFreakonomics are the No. 2 and No. 6 books, respectively, on U.S. college campuses. In the real world, SuperFreakonomics has entered its 15th week on the N.Y. Times best-seller list, while Freakonomics is in its 23rd week on the paperback list. Blog posts about the SuperFreakonomics global-warming controversy are collected here.