For many, the appeal of time outdoors lies in its slowed-down simplicity: soaking tired feet in a cold stream, cooking over a fire, sleeping under the stars. But there are moments when even the most hardcore hikers long for modern conveniences—namely, when it’s time to go number two. It may seem intuitive that in the woods, all the world’s a toilet. After all, animals go wherever they please. But that assumption is wrong for a number of reasons, according to Faith Overall, community engagement manager at Leave No Trace, an…