You're wasting your poop: How compost toilets save you water and money

TUCSON, Ariz. (KGUN) — Tucked away at the busy intersection of Alvernon and Speedway is Watershed Management Group. The serene campus is covered with food-producing plants and trees that juxtapose the rubber smells coming from the tire shop across the street.

One wouldn't know that those plants are growing with the help of humanure — or fertilizer from human feces.