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comment by user-inactivated
user-inactivated  ·  2735 days ago  ·  link  ·    ·  parent  ·  post: SpaceX Interplanetary Transport System

I'm assuming that they will be using water not only for keeping the people alive but also radiation shielding. And aquaculture. And fuel. etc. This is worse case scenario. Still, I anticipated the needed water being much, much more than I mathed out.