U.S. National Park Service

The U.S. National Park Service (NPS) faces a waste management quandary: it aims for a zero-landfill future, yet visitors deposit over 100 million pounds of waste there every year. To avoid sending enormous loads of trash to the dump, the NPS must find ways to recycle, reuse, and compost as much waste as possible. And even with major challenges, such as existing in remote, rural locations, the NPS is well on its way to eliminating its reliance on landfills. Here's how they're doing it.