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"It's a substance called hexafluorosilicic acid or its sodium salt: silicon fluorides,"
"It's a substance called hexafluorosilicic acid or its sodium salt: silicon fluorides," Connett explains.
Much of North America's water is fluoridated, meaning that water utilities add hexafluorosilicic acid, sodium silicofluoride or sodium fluoride to local water supplies.
Most people are surprised to learn that the chemicals used to fluoridate water - hexafluorosilicic acid and its sodium salt - are actually waste materials taken from pollution scrubbers used in the phosphate fertilizer industry.
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