Biosand filter
From Akvopedia
Movie
- Health and filters [http://www.youtube.com/watch?v=LPAWuws7qMM&feature=related
- Demo www.youtube.com/watch?v=9Cj4yO4nLLY&feature=related
- www.youtube.com/watch?v=aLKwH68LjnM
- Ghana www.youtube.com/watch?v=4sebVBgBLKY
- Zambia www.youtube.com/watch?v=f5htXA1OVio&feature=related
External links
- Organisation http://biosandfilter.org/biosandfilter/