Humans manage to pollute anywhere they go. Earth is covered in pollution, as we all know, and now there's so much junk floating in space around earth's orbit that it's posing hazards: http://www.guardian.co.uk/science/2008/feb/24/spaceexplorationspacejunk The moon is covered with litter too, all that junk we left behind. So, Lawrence, you were saying about moving to another planet? How long before that planet would start to look like a slum? --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.