Over the winter I read "The World Without Us" by Alan Weisman. I'd normally think a book about the environment would be a snooze-fest, but this bookn isn't. Rather than focus on the politics of environmental issues (global warming, pollution, etc), Weisman takes a unique and rather macabre approach: What would happen if humans suddenly disappeared? What would be here 500 or 10,000 years from now? How long would it take for your neighborhood to completely vanish without a trace? Would anyone know we were ever here?
The book avoids activist political rhetoric. It's just an interesting "thought experiment" rooted in a variety of stuff like physics, paleoecology, biology, evolution, etc. It's tone is very simple and objective, and it covers alot of interesting topics that I've never even thought of. Unlike most environmental books that talk about all "the bad stuff" that's been done, this book shows you how insignificant the human species really is (or is not). Both morbid and fascinating.
http://en.wikipedia.org/wiki/The_World_Without_Us