Biosand water filtration method - MUCH MUCH more economical. Plenty of vids here on youtube on the subject. I highly recommend the method to not just people in developing countries but to people all over the world (will save you money even in the modern Western world)
Biosand water filtration method - MUCH MUCH more economical. Plenty of vids here on youtube on the subject. I highly recommend the method to not just people in developing countries but to people all over the world (will save you money even in the modern Western world)
youniverse9 1 year ago