afyi > the majority of piss is reusable water > the remainder contains nutrients the body couldn't use at the time so allowed to pass on through why waste it and not extract the potable water from it and pass the unused nutrients into the food-making loop? > human excrement contains large amounts of usable nutrients that the body simply had no need of and couldn't store so allowed to pass on through so why waste those unused nutrients? > not sexy but you'd rather concentrate on big impressive engines, right? > "someone else will do it" and to date... nobody has. > and we haven't even talked about the radiation hazards of space beyond the protection of the earth's magnetosphere yet.
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