Lets not forget about the solid rocket boosters.....that aint H and O2, more
like aluminum oxide......... oh yeah, this is a Vanagon list....oops..:)

>>
>None!
>Space shuttle exhaust is simply water vapor.  They are combining
>hydrogen with oxygen to get water.
>
>I think this is correct, someone correct me if I'm wrong.  I was also
>amazed to find that it's not pollution, it's water :-)
>
>--
>Sean Bartnik
>Fredericksburg, Virginia
>'81 Volkswagen Vanagon Westfalia
>'74 Volkswagen Karmann Ghia convertible
>http://www.type2.com/bartnik/myvan.htm