Albany, N.Y.: Timesunion.com - Print Story
Fluoride occurs naturally in phosphate rock that is found 25 to 40 feet below the ground in what was once ocean. The fluorine gas created during the fertilizer manufacturing process used to be burned in smokestacks and released into the air, Besthoff said.
When pollution laws were enacted, manufacturers began trapping the gas and converting it to fluoride.
'Making the product is energy intensive and delivering it is energy intensive,' Besthoff said."


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