so i was nursing a cold with warm Tang. and i got to thinking how Tang is suppoed to be what the astronauts drink. then i remember some thing i watched on tv about how NASA had worked on some machine that can reycle urine into clean drinking water.
My country (Singapore) actually has to do something similar to that because it doesn't have natural resources. They call it "NeWater", and it's mixed at a low percentage (right now, at least) with water bought from neighbouring countries such as Malaysia.