XPost: alt.astronomy, sci.environment, sci.space.policy   
   XPost: alt.global-warming   
   From: dietz@dls.net   
      
   ianparker2@gmail.com wrote:   
      
   > 1) Try to get mass down 55kg/kms. and use a completely recoverable 2STO   
   > with ion propulsion to L1 from LEO. This is doable.   
      
   One thing to point out is that you don't need mirrors,   
   you need devices that can diffract sunlight by a degree   
   (or so) so it misses the Earth.  Small angle scattering   
   can be done with a sparse array of scattering elements,   
   so the mass could be much lower than a full mirror (even   
   a mirror with submicron holes).  Something like a random   
   network of tangled carbon nanotubes, arranged between   
   think support elements, might do the trick.   
      
   You still have problems with CO2 acidifying the oceans,   
   and at high CO2 levels you get a change in the temperature   
   distribution even if global average temperature can   
   be controlled.  Still, given the feckless response of   
   the world to calls to limit CO2 emissions I don't think   
   it would be responsible to retard a backup plan such   
   as this, if it had a real chance of working.   
      
   	Paul   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)