http://science.nasa.gov/science-news/science-at-nasa/2000/ast02nov_1/ http://science.nasa.gov/science-news/science-at-nasa/2000/as... So there is still some lo

http://science.nasa.gov/science-news/science-at-nasa/2000/ast02nov_1/ http://science.nasa.gov/science-news/science-at-nasa/2000/as... So there is still some loss of water even with the recycling