Natural fluoride concentrations in water need to be taken into account as well when deciding whether to add fluoride. Japan has high natural fluoride concentrations and is a high IQ country.
Man I hate the culture war. Just because you don't like someone doesn't mean you HAVE to disagree with everything they say. I wasn't sure about fluoride in water, so I looked it up, and the **science** says it can cause decreased IQ in children. You really wanna risk that? Also, you know who stopped putting fluoride in water... 98% of Europe.
https://www.reddit.com/r/nottheonion/comments/1grj3v1/winter_haven_commissioners_vote_to_remove/
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