The evidence concerning climate change is interesting from an intellectual point of view, but a huge distraction in a practical sense. There are numerous reasons for closing a coal fired power station that are more immediately provable than global warming. The polarized debate is no alternative to a mature and nuanced understanding of the environment. You will never get that from one book.

"Break Through: From the Death of Environmentalism to the Politics of Possibility"[1] is an excellent discussion on the politics of these questions.

[1] http://www.amazon.com/Break-Through-Environmentalism-Politic...