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Farahim commented on Water and Sanitation Challenge

In Azerbaijan (a country in Eastern Europe) we used to use "water stone" to get safe water. I could not find any article about how it works, here is a picture you can have a look: http://elanisimo.az/e/full/2016/01/18/9017.jpg

- you put water to the inside of the stone
- after 6-8 hours you will get 1-gallon drinkable water
- you can clean the stone and use it for years.
This is a mobile version of the stone for a family. We can make a big one for a village or a school. It will be a sustainable solution. You don't need to maintain it, except cleaning. 
But how they will get water? Drilling probably. 
Looking forward to  your comments!Freddy

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Farahim commented on A Non-University

I loved the idea! It can be the solution for "education for everyone" challenge too. Let's do it.