In Namibia, Miss Emily Cummins is known as "The Fridge Lady". This is because she invented a solar-powered refrigerator that is can help many poverty-stricken Africans.
The solar-powered refrigerator works with two cylinders, one inside the other. The inner cylinder is metal while the outer one is wood or plastic. In between these two cylinders is either sand or soil, which can be soaked with water. The sun's rays heat the wet material, and as the water evaporates, the heat is removed from the inner cylinder. This keeps the fridge at a cool six degrees Celsius.
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