“CHARCOAL FILTERS have an annual estimated cost of US$10 to 100 for a family that uses 25 liters of water per day. Countries with local access to charcoal, or materials … will face significantly lower costs that those that have to import the charcoal filters. Activated carbon filtration systems have an estimated average annual cost of over US$100 for a family that uses 25 liters a day.”
http://lnkd.in/dna7M4i
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022