A man whose claim to fame is inventing the Super Soaker was working for NASA and has invented a new method of generating electricity from heat.
The advantage it has over other methods is it apparently a *lot* more efficient than current methods., and could be applied to (say) solar energy to make collecting solar energy a lot more efficient.
It can also be applied to any method of generating electricity as long as that method generates heat (so, Nuclear or Fossil fuels), and makes that a lot more efficient as well.
Sadly, we are some way from it actually being viable, but it's a start..
http://www.theregister.co.uk/2008/01...e_solid_state/
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