Electricity-free Fridge Could Change Millions of Lives

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Evaporative cooling systems have been around for a considerable length of time. Stone frescoes from Egypt that date to 2500 B.C.E. portray slaves fanning a stoneware container to cool its substance. Leonardo da Vinci additionally explored different avenues regarding evaporative systems, thus did Benjamin Franklin. Be that as it may, at that point power went along, as did the cooler and evaporative cooling appeared to blur into history. 

At that point, in the late 1990s, a Nigerian man named Mohammed Bah Abba resuscitated the antiquated innovation of the earth pot-in-pot framework. Still being used today, the Zeer pot comprises of two dirt pots, one littler than the other. The little one is set inside the bigger one and the space between them loaded up with sand. By wetting the permeable grid of sand with water and afterward setting a cool, wet fabric over the top as a cover, dissipation becomes effective, and any perishables put away inside remain fresh for a longer period of time. 

It was an extraordinary advancement however was not generally received outside of Nigeria. 

The zeer pots have a life expectancy of around a couple of years since they either break or the pores get stopped up. 

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