defluoridation meaning in Hindi

Defluoridation is needed when the naturally occurring fluoride level exceeds recommended limits.
High levels of fluoride occur in groundwater and defluoridation is in many cases unaffordable.
Researchers at Princeton University and the Birla Institute of Technology, Mesra, Ranchi are currently investigating defluoridation options, while performing an epidemiological survey to assess the extent of fluoride linked health problems and the impact of future interventions.