Reenvisioning the restroom

This week on Living Planet, we explore a topic that's perfectly natural and something we do every day. Whether you use a squat toilet, a pit latrine or a water closet, humans need to go. But the ways we do so are often not very efficient, useful or good for the environment. So we're taking a look at the history of human excrement and some creative solutions to dispose of and repurpose our waste.