And speaking of sweat

Swedish Machine Turns Sweat into Perfectly Good Drinking Water! | Inhabitat - Sustainable Design Innovation, Eco Architecture, Green Building

Apart from a high-tech filter developed at the Royal Institute of Technology in Stockholm, the machine is actually fairly simple to make with basic parts – including a regular clothes dryer. A pile of sweaty clothes goes into the dryer in order to spin out the water. This is then exposed to UV light before it passes through the high-tech filter to remove salt and bacteria. And lastly, the water is funneled through a coffee filter to remove clothing fibers.

I think I just decided to quit wearing socks. JIC.