3 ms·
> filter their water what kind of filtering?
by andrekandre 6y ago
> filter their water
what kind of filtering?
- sebmellen 6y agoReverse osmosis and carbon filtration: https://en.m.wikipedia.org/wiki/Reverse_osmosis#Drinking_water_purification https://en.m.wikipedia.org/wiki/Reverse_osmosis#Drinking_wat...