Top 20 countries in population potentially affected by fluoride concentrations in groundwater greater than 1.5mg/L. From Global analysis and prediction of fluoride in groundwater by Podgorski J & Berg M, Nature Communications, August 2022.
Countries with high level of fluoride in groundwater. Reproduced with the permission of the British Geological Survey ©UKRI, All rights Reserved, Permit Number: CP19/030 (Edmunds and Smedley, 2013).
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