Nuclear power's problem isn't at the energy creation stage but at the waste stream. Highly radioactive waste is a difficult issue no matter how you look at it.
Its also not terribly cost effective and will probably fail due to that issue alone.
While I tend to have a "lets do everything possible in an effort to get to true clean energy" (which I define as solar, wind, geo and tidal), part of that equation will be "cleaner" coal and bio fuels. I think economics will ultimately force the short term solutions into being and that's why current investment needs to be in the harder to crack issues like electrical storage, 4th gen bio fuels (Craig Venter of the human genome fame is working on it).
FYI, natural capitalism is a great book from mr. hawken. He has a more current book which I haven't read called blessed unrest
I agree with Mr-914 about unlimited growth being a fairy tale that we are way too dependent on as a linchpin of our systems.
Ultimately I feel the only way forward is to be a technologist. Everything else is too optimistic about human nature and its ability to control itself.