I know I shouldn't drink seawater (because of the salt it contains), but how can I desalinate it?
We've all heard stories about how people saved their lives by drinking their urine. Is drinking urine safe when there are no other water sources available? Can I filter it with a water purifier?
I live in the Arizona desert, and during the summer, despite my best intentions, I always seem to end up doing some hiking in the summer heat. What is a good formula to figure out how much water I ...