Scientific American, National (9/29/15) – Kartik Chandran, of Columbia University and winner of a MacArthur Genius Grant, sees sewage as a resource. He believes the resources like carbon, phosphorus and nitrogen found is sewage sludge can be used to benefit developing countries. Chandran views waste streams as energy streams. Engineers Without Borders’ student chapter at Columbia University is doing field work in Ghana. They are designing toilets that recover nutrients in villages so they can be used in agriculture.