Just finished reading Hot, Flat & Crowded by Tom Friedman. The premise of the book is that the earth is getting flatter (see his other book The World is Flat), hotter due to global warming, and more crowded due to population growth. With 6 billion and growing people polluting at our current rate, we are in big trouble since we're not sustainable. His book goes into why we need a green revolution (Code Green in his words) to change our world.