The simplest cost effective technique to clean and purify the drinking water?
Enviado por FAHD RASUL el 12/05/2012 - 09:47.
Please share if you know about these techniques. It would be helpful for the poor...
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Can you see this Namib Desert Beetle? NBD Nano aims to mimic the way a beetle survives in an African desert to create a self-filling water bottle capable of storing up to three litres every hour.
http://www.bbc.co.uk/news/technology-20465982