He knows all about the challenges of preserving foods in an area where there are no refrigerators or electricity. His ingenious Pot-in-Pot Preservation Cooling System is basically a small pot placed in a larger one, with the space in between filled with moist sand. The inner pot is filled with fruit or vegetables and covered with a wet cloth. As the water in the sand evaporates, it carries heat away from the inner core. Produce stays fresh for three weeks or more, rather than the usual few days. Winner of the 2001 Rolex Award for Enterprise, Abba is using his award money to make and distribute more of his food cooling system units — a simple, elegant idea that is making a difference in the lives of many families.