2017 Fuller Challenge Finalist Sistema Biobolsa is contributing to the circular economy for farmers in developing countries around the world. Recent coverage highlighted a success story in Kenya. Sistema Biobolsa produces and distributes affordable, state-of-the-art biodigesters that convert farm and household waste into resources. In Kenyan farmer Kimani's case, the Sistema Biobolsa biodigester closes the loop of his production cycle, and his award-winning coffee beans become a localized case study on the circular economy. Check out this recent account of how an elegantly simple technological intervention can help one farmer transform his production system.