> They'll eventually pee and sweat [the water] out.
It's infuriatingly hard to find good citations, but I think they actually mostly breathe it out. IIRC, the water breakdown for some (spacecraft) life support system was something like 50% from respiration, 30% in urine, 10% in sweat, and 10% in feces.
It's infuriatingly hard to find good citations, but I think they actually mostly breathe it out. IIRC, the water breakdown for some (spacecraft) life support system was something like 50% from respiration, 30% in urine, 10% in sweat, and 10% in feces.