One of the toughest challenges that faces developing nations is the large expense associated with putting remote villages on a national power grid. But if National Geographic Emerging Explorer Thomas Culhane gets his way, power grids may be a thing of the past. He has developed a system by which individual homes install an "artificial stomach," in their yards, where they put table scraps and any other organic waste that they might have. A mixture of bacteria inside the barrel digests the food and creates biogas that can be burned in the kitchen to heat a stove. Culhane has also invented ways that allow the biogas digestor to create electric power enough to charge a cellphone or light a bulb.
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