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How a biosand filter works - Animation Style!

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Uploaded on Jan 7, 2009

Here's an explanation of how a biosand filter for those of us with short attention spans.

Seriously though, these things took a lot of research by many dedicated field workers and scientists. They are deceptively simple which makes them an incredible solution for the world water crisis.

To see the animation about the biolayer and how it works:

http://www.youtube.com/watch?v=BUhO3Y...

www.globalize-this.org

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