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→Additional information
*solar pond [http://en.wikipedia.org/wiki/Solar_pond]
*solar pond [http://en.wikipedia.org/wiki/Solar_pond]
*bio energy[http://en.wikipedia.org/wiki/Bio-energy]
*bio energy[http://en.wikipedia.org/wiki/Bio-energy]
*
*tidal energy [http://en.wikipedia.org/wiki/Tidal_energy]
==Useful websites==
==Useful websites==