Founder of 350.org. He's got about a chapter and a half in this book (starts on pp. 57) where his argument is that nuclear is nice and all, but much of the economies it gains are due to subsidies and externalities. He quotes a study that puts the real-world capital expenditure cost of new nuclear plants at 17 to 22 cents per kWH. Not only that, but from a real world standpoint you have to consider the community response and regulatory antagonism nuclear power faces which push nuclear reactors years late and over budget.

"Bottom line: building enough conventional nuclear reactors to eliminate a tenth of the threat of global warming would cost about $8 trillion, not to mention running electricy prices through the roof. You'd need to open a new reactor every two weeks for the next forty years and, as the analyst Joe Romm points out, you'd have to open ten new Yucca Mountains to store the waste. Meanwhile, uranium prices have gone up by a factor of six this decade because we're - you guessed it - running out of the easy to find stuff and miners are having to dig deeper."