solar energy uber alles
Most of our energy is derived indirectly from the sun, which is a nuclear energy producer, (to say the least).
So, Peak Oil Optimist, posts on a good idea vis a vis solar energy:
The Endless Energy Well in the Deep Sea
Via Wired, a pretty interesting story about one Dr. John Piña Craven, the "brilliant psychotic" behind the Navy's Polaris program, and now with an equally half-crank, half-why-didn't-I-think-of-that solution to the world's energy problems: placing pipes to the ocean deeps to harvest the temperature differential between the upper (warm) layers of the oceans and the lower (near freezing) depths.
If we must invest billions in a new infrastructure, this kind of idea I can get wholeheartedly behind; it doesn't pollute. Viability - who knows, got to get cracking, "civilization" is way behind the eight ball when it comes to investing in sources of energy that don't fang back.
I got smacked down in the comments for this one, which will teach me to link to the techno fabulists at Wired. This technology has about as much promise as fusion - it is fifteen to twenty years out, now and yesterday.
Examine the technology. For all the recent hype about OTEC, the technology seems to have advanced but little since its last turn in the news spotlight. All the available energy in the universe counts for zilch if we can't capture and convert it affordably.