Plastic may not be the first thing that comes to mind when one thinks of footwear. But a significant portion of modern shoes, including soles and uppers, are made using plastic materials. The billions of pairs of discarded shoes, flip flops, and sandals that end up in landfills every year, take hundreds of years to decompose and pose a substantial environmental challenge. California-based Blueview hopes to alleviate the problem with what they claim is the world's first fully compostable shoe.