Richard Muller is not a climatologist, yet he is one of the most controversial figures in climate science. Until recently, the UC Berkeley physicist was a sturdy skeptic of the science behind global warming. But last fall, after he conducted a comprehensive analysis of more than two hundred years of global temperature data, he emerged an apparent convert. Now Muller's set to publish a new book that could thrust him in the spotlight again; "Energy for Future Presidents" casts a critical eye on many current "green energy" solutions while championing more controversial methods like nuclear power and natural gas fracturing or "fracking."

• KQED's Climate Watch