Justin J. Henriques, a systems engineering graduate student at University of Virginia, explains how he and his colleague William G. Schnorr designed and created a sustainable biogas digester to be used for cooking in the Kenyan village of Namawanga. The presentation, "Sustainability Assessment and Implementation of a Biogas Digester System in Western Kenya" was given at the IEEE Green Technology Conference in Grapevine, Texas, on April 15, 2010.