Electricity-free refrigerators

Malapati Raja Sekhar writes about the Zeer, a refrigerator invented by Mohammed Bah Abba of Nigeria that uses two earthenware pots to cool perishables.  He believes this concept would be a big boon for Indian farmers, and there is a business opportunity waiting for someone. Anyone listening?

Now coming to the developmental economics, every year many farmers all over India, due to lack of proper preservation systems, sell their produce at throw-away prices. It is true and in fact, I was grown-up my whole life listening to those horrible stories such as 1 Kg of vegetables for 15 Paise (0.01 USD) or 25 paise. Then the farmers throw them on highways as they cant fetch the price of transport. Surprisingly, at the same time, in a 100 KM near-by vegetable market in any town/city is sold at Rs. 20 per KG.