XPost: sci.space.policy, sci.physics   
   From: jfindley@cinci.nospam.rr.com   
      
   In article , invalid@invalid.com says...   
   >   
   > there may not be any coal or oil on Mars if no huge plants growing in   
   > its past like on earth. "=> no fuel on Mars"   
      
   So you use solar and nuclear power.  And if fusion power ever becomes   
   practical, you use that too.  Just because we're dependant on fossil   
   fuels here on earth doesn't mean a Mars colony needs to be!   
      
   Jeff   
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