Cities across the US are adopting unconventional methods to make their infrastructure more sustainable. In Maine, for instance, engineers buried 20,000 old tires beneath a road to help protect it from frost damage . In 2012, authorities in Bellingham, Washington, took a different approach: they used porcelain from more than 400 recycled toilets in a roadway project.
The Meador Kansas Ellis Trail project became notable for its sustainable construction practices and was awarded the world's first official Greenroads certification. The certification, awarded by the Greenroads Foundation, recognized the project's innovative use of recycled materials, including porcelain from more than 400 recycled toilets. The toilets were crushed and incorporated into an aggregate material dubbed "poticrete."
