Changes

Biosand filter

238 bytes added, 10:49, 18 June 2008

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= Movie =

* [http://www.youtube.com/watch?v=aLKwH68LjnM www.youtube.com/watch?v=aLKwH68LjnM ]

* Health and filters [http://www.youtube.com/watch?v=LPAWuws7qMM&feature=related www.youtube.com/watch?v=LPAWuws7qMM&feature=related ]

= External links =

* [http://biosandfilter.org/biosandfilter/ http://biosandfilter.org/biosandfilter/ ]

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