Solar CITIES e.V., a German-based non-profit organization that works on local renewable energy systems development and training in impoverished communities in Africa and the Middle East, has been working for the past two years on a Blackstone Ranch/ National Geographic Innovation Challenge Grant to develop and deploy small scale kitchen-waste-to-cooking-fuel biogas systems. This paper details the engineering, technical, resource and social challenges faced and overcome by the Solar CITIES team in environments as diverse as the frigid coastal landscape of Alaska, the ghettoes of Los Angeles, the moist cold residential corridors of Sonoma County and Seattle, Washington, the icy rooftops of northern Germany, the arid hills of Israel and the Palestinian territories, the congested urban slums of Cairo, Egypt, the informal shanty-towns of Nairobi, the sensitive savannah landscapes of the Masai tribes of Kenya and the bush-people of Botswana, the residential and rural areas of central Nigeria and the rain-forest and lakeside villages of Tanzania.
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