David MacKay, a Professor in the Department of Physics at the University of Cambridge, has produced a book that discusses the prospects for sustainable power generation (sustainable defined as lasting at least 1000 years) - wind, solar, tide, wave, bio, nuclear, fusion, etc. and concludes that the only reasonable choice is nuclear.
There is a review of the book at
http://www.boingboing.net/2009/04/09...-energy-w.html.
You can download a pdf of the book from his website at
http://www.withouthotair.com/