I have recently returned from Central America, where I was training extensionists to build and maintain dry, urine-diverting toilets. See page four of Sustainable Harvest International's spring newsletter for a summary of my work there.
These toilets keep pee and poop separate. The pee, which is sterile, can be diluted and used as a liquid fertilizer. The poop is treated over time with heat from a solar collector, which destroys germs. Then it can be used to improve soil. How cool is it that with a little concrete, wood, and metal you can turn a farmer's toilet into a fertilizer factory?
