Ro water purifier, Availability : 10-12 Kg

The reverse-osmosis (ro) water purifier at home seems to be a benign invention, allowing people to drink clean, healthy water. The ro process is efficient in terms of filtering out toxic substances like arsenic and fluoride, especially in areas where groundwater is heavily contaminated. Simultaneously, though, ro systems, at both household and industrial levels plough back concentrated amounts of these substances back into the aquifers. Experts suggest that regulations are needed to stop the unchecked use of ro, or at least the disposal of the stuff left behind after filtering.