When you think of national parks, you might picture the vast plateaus of the Grand Canyon, the intricate wetlands of the Everglades, or the inspiring viewscapes of the Grand Tetons. You probably don't envision 100 million pounds of mashed water bottles, barbecue-smudged paper plates, and crumpled coffee cups — but that is the staggering quantity of garbage that is generated in our National Parks each year. And handling that amount of waste is becoming a huge problem.