Episode 26
The improbable saga of the BioSand Bag Filter, a device to bring clean drinking water to poor and remote areas of the world.
aquarius Biosand bag filter
September 21, 2008
Episode 26
The improbable saga of the BioSand Bag Filter, a device to bring clean drinking water to poor and remote areas of the world.
aquarius Biosand bag filter
September 21, 2008