Inventor of No-Electricity Refrigerator Wins Rolex Award

Mohammed Bah Abba of Nigeria won a Rolex award for his pot-in-pot refrigerator. It consists of a smaller clay pot inside a larger clay pot. The gap is filled with damp sand. As the water evaporates, the inner pot cools. Food that used to spoil in a few days now stays fresh for weeks. Second-order effects are already being noticed — for one thing, girls who had to skip school to sell food at markets can now attend classes

Share this Story
Load More Related Articles
Load More In Science

Photos from Flickr