Originally Posted by grobblewobble
A transition to renewable energy is already possible. It would be a large investment, but in the long run it would mostly pay for itself because fossil fuels will in any case become more and more expensive anyway. With a combination of nuclear power, wind and solar energy it is already possible to supply a very large part, if not all of our energy needs. The only thing needed is the political will to do it. It would be expensive, but not as expensive as the Iraq war, for example.
There's a very good book (available for free) about this subject that discusses the numbers behind this matter. Without the Hot Air, by McKay.