Pot in pot refrigerator In 2001, Nigerian Mohammed Bah Abba won the 2001 Rolex Awards for Enterprise with his invention of a simple cooling system to preserve food in rural areas with no electricity. His solution was a Pot-in-Pot refrigerator, which relies on the concept of evaporative cooling. The system works by putting a smaller clay pot inside a larger one, separating the two by constantly moist sand. Evaporation causes a cooling effect in the inner pot.
The National Center for Appropriate Technology (NCAT) is currently seeking non-profit organizations, schools and public agencies in Arkansas, Iowa, Pennsylvania, Montana and Texas to host Energy Corps AmeriCorps members for the 2012-2013 program year.