From: roy@panix.com   
      
   In article <1138202258.435499.251660@z14g2000cwz.googlegroups.com>,   
    psturroc@gmail.com wrote:   
      
   > Are there any rocket fuels -- existing or potential -- that are less   
   > polluting than kerosene or hydrogen?  If so, are any of them   
   > economically feasible?   
      
   I can't imagine anything less polluting than hydrogen.  The only possible   
   combustion product of hydrogen is water, regardless of temperature or mix   
   ratio.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)