The Pithy Amateur Astronomer

http://www.space.com/missionlaunches/astronauts-urine-recyler-repair-100210.html

I used to wonder how the astronauts on the space station got all their provisions such as food and water. I used to think that various missions brought those provisions and off-loaded them into a reservoir. It turns out that urine, sweat, and any other condensation produced on the ISS is purified using a $250 million dollar piece of equipment.

Sound gross? What do you think the water treatment plants on Earth do?

For further reading, check out http://www.space.com/missionlaunches/090520-space-urine.html