Good morning dear members: are there any BioSand Filter implementer out there? Could you share with us how many filters and countries of your projects? CAWST is collecting data of the reach of the Biosand Filter for its 30rd birthday and your collaboration would be very valuable!
Good morning dear members: are there any BioSand Filter implementer out there? Could you share with us how many filters and countries of your projects? CAWST is collecting data of the reach of the Biosand Filter for its 30rd birthday and your collaboration would be very valuable!
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