For those interested in green living ideals, and trying to separate real sustainability from marketing campaigns, I recommend Green Metropolis by David Owen.
He's a bit long-winded, but what he says is right on-the-mark (i.e. the redundancy of putting solar-panels a 3,000 sq. ft., brand new home).
It's mainly about how to reduce your use of fossil fuels, and how living in higher density areas that don't condone sprawl is the only real key to finding a sustainable culture in the USA. Check it out!