Identify an energy source that is not a practical source at this time.

0 votes
     biomass
      fusion
      hydroelectric
      geothermal
      all of the above
      none of the above
asked Jul 2, 2012 in Geography by anonymous
    

1 Answer

0 votes
fusion
answered Jul 5, 2012 by Geodude ~Top Expert~ (9,680 points)

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