We live on a planet that supports over seven billion people. There are cities and settlements on every continent, in every climate, barring only the harshest, most inhospitable environments. Although we have so much space and have thrived thus far, we consume so much that the waste we create is threatening the well-being of our Earth. As just one human among many, doing something about this can seem daunting, even inconsequential. Behaviors like household recycling and limiting personal waste are...