Well, maybe they DIDNT have... ways to get rid of 'waste' but it is hard to smell through a television screen and maybe they just didn't bother to show all that sort of stuff in the movies and there was no reason to mention it in the books.
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“That's the only place in all the lands we've ever heard of that we don't want to see any closer; and that's the one place we're trying to get to! And that's just where we can't get." - Sam
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