In 2010 on a Blackstone Ranch Foundation/National Geographic Innovation Challenge Grant, Solar CITIES Egypt Director Hanna Fathy, from the Zabaleen Trash Recycler's Community, and Dr. T.H. Culhane, co-founder of Solar CITIES e.V. travelled through Kenya, Tanzania, Burundi and Rwanda, introducing food waste-based biogas systems to friends and colleagues along the way. In Tanzania Culhane and Fathy worked with fellow 2009 National Geographic Emerging Explorer Grace Gobbo of the Jane Goodall Institute and JGI Intern Joram Samaon to build two 2000 liter ARTI style digesters in the village of MKalinzi (on the edge of Gombe Stream Chimpanzee Reserve, to help stop deforestation at the margins for firewood) and two in the city of Kigoma (one at the home of Grace Gobbo and one at the home of Joram Samaon, to help relieve the pressure on the forests for urban charcoal.)