Earlier quoted context omitted.
And removing fluoride from the water
Why does American drinking water need fluoride - for the few seconds people brush their teeth? Other developed nations seem to do get by just fine without it (i.e, most of Europe). Does modern tooth paste not contain the components for proper cleaning? I feel like I'm missing something here, because I don't swallow my tooth paste but I drink my tap water. But if fluoride is fine in water that we drink, why not just a…
You are missing something. If you're this confused about a topic, you should at a bare minimum read the Wikipedia page.