Non-profit creates open-source drinking water filter for 1/10th of the cost
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Dimac Biosand Ultra-Clumping Small Granules
She's Transforming Her Village : Concordia Welfare & Education Foundation
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Non-profit creates open-source drinking water filter for 1/10th of the cost
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She's Transforming Her Village : Concordia Welfare & Education Foundation
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Biosand Filters and Brick tanks: A water solution in Gomba… | Flickr
