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My solar panels give me free lecky every daylight hour even when it's dull, I even export half of what they generate back into the grid. All we need are these things on every roof space all over the world and the need for fossil fuel power stations is wiped out. Cover the Sahara with them, a few nomadic tribes might have a moan and some may get lost to terrorists but that's a risk with any energy installation.And that's just basic 2010 solar panel technology. Now if we went for geothermic energy, wind, tidal etc then I think we're OK when the oil runs out and we still haven't got fusion.
BYW I posted this link ages ago, it's fairly simple to follow and makes a complete mockery of economic growth.http://www.youtube.com/watch?v=F-QA2rkpBSY
Talking about covering the Sahara Don, I've wondered, for years and years and years why no one, not no one as far as I've ever been able to see, has suggested we change the albedo of planet Earth. Earth getting too hot? Well paint the f***er white then! Simplistic I know, but reflecting incoming rays back into space is so bloody obvious it's untrue. It would take aeons to deliver of course, but lets say all cars should be white, roof tiles should be white and flat roofs should be painted with some white sealing compound. There's billions of things you could do with that basic idea. Even stupid ideas like dropping talcum powder all over the Saraha would have an impact. (Bit short term I know once the wind blows!) You could even reflect and focus loadsa sun rays to a point in space and use that scary amount of heat to generate electricity. A 'space ladder' type thing is perfectly feasible so transporting water up and power down ought to be conceivable.BobG