Pot-in-pot system for evaporative cooling of foods

Via the Uplift Network:

Prof Abba created a pot-in-pot system to keep perishable items cool in desert climates, though obviously important for people without electricity as well, through the use of two pots, one inside the other, and the space in between filled with wet sand. He won the Rolex Award, and has distributed more than 91,000 of these to people in Nigeria. Here is an excellent example of selfless entrepreneurism.

A California State Science Fair study in the San Diego area by Garrett Rueda showed up to a 23 degree F cooling effect by this system. There's a story about it in the 2001 January "Popular Science".

Technorati Tags: innovation