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2. Experts battle culture warriors over a 'revolutionary' public ...

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   In 2015, the U.S. Public Health Service, under the Department of Health and Human Services, set the optimal level of fluoride in water at 0.7 milligrams per liter — a level that, after decades ...

3. Water fluoridation controversy - Wikipedia

   en.wikipedia.org/wiki/Water_fluoridation_controversy

   e. The water fluoridation controversy arises from political, ethical, economic, and health considerations regarding the fluoridation of public water supplies. For deprived groups in both maturing and matured countries, international and national agencies and dental associations across the world support the safety and effectiveness of water ...

4. Defluoridation - Wikipedia

   en.wikipedia.org/wiki/Defluoridation

   In the 1930s, several nations began to investigate fluoride's negative effects and how best to remove it. An aluminum and sand filter that removes fluorine from water was devised by Dr. S. P. Kramer in 1933; in 1945, M. Kenneth received a French patent for a water defluoridation technique; and in 1952, a functioning activated alumina community ...

5. Activated alumina - Wikipedia

   en.wikipedia.org/wiki/Activated_alumina

   Activated alumina. Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 m 2 /g. The compound is used as a desiccant (to keep things dry by adsorbing water from the air) and as a filter of fluoride, arsenic ...

6. This $20 Shower Filter Could Make Your Skin Look Even Better

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   6-Spray Wall Mount Fixed Rain Shower Head. Well water is often some of the hardest water of all. According to the EPA, it's often peppered with contaminants from nitrates to fluoride to heavy ...

7. Reverse osmosis - Wikipedia

   en.wikipedia.org/wiki/Reverse_osmosis

   Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria), and is used in ...