crushed toilet material, or "poticrete" - Image from

The Greenroads Foundation, which facilitates a rating system to provide LEED-like certifications for roadways, made its first award last month, to the Meador/Kansas/Ellis Trail project. The project was recognized at the silver level for its sustainable practices, including the incorporation of around 5 tons of crushed up, recycled toilets as part of the asphalt for a widened sidewalk. Greenroads was developed at University of Washington by faculty and students in Civil and Environmental Engineering and launched with the help of the Center for Commercialization. Read more about this project, and about Greenroads, here!