In article <Xns94404FA3D10A5H110W296LC45WIN3030R@130.133.1.4>,
David A. Scott <daVvid_a_scott@email.com> wrote:
>   Interesting its not worth the RISK OF LIFE to bring it back
>but it is worth the RISK OF LIFE to attach a rocket to it to 
>up burn it up in the atmosphere.

No, the rocket attachment could be done as part of the last servicing
mission (there is at least one more planned), so it would not involve any
added risk. 

>I wonder if anybody has done
>some sort of environmental study about the tradeoffs since the
>mission itself and the rocket attached will add more pollution
>to the air.

Completely insignificant compared to all the other stuff that goes into
the atmosphere.
-- 
MOST launched 30 June; first light, 29 July; 5arcsec    | Henry Spencer
pointing, 10 Sept; first science, early Oct; all well.  | henry@spsystems.net