Videos:BioSand
- Clean Water for Pakistan - How the Biosand Filter Works
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09/03/2008 12 - Channel:Nonprofits & Activism
- Tags:Pakistan Clean Water Biosand
- The BioSand Water Filter: Simplicity at Its Best part1
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08/18/2008 8 - Channel:Science & Technology
- Tags:BioSand Water Filter Simplicity