Cloud seeding would like to have a word with you. https://www.tdlr.texas.gov/weather/summary.htm

Our teeth are made of hydroxyapatite, a mineral primarily composed of calcium and phosphorus. Eating animal fats, seafood, Vitamin C, Vitamin K (animal sources- plant ones are not bioavailable), and food with plenty of minerals like magnesium, boron (big one), potassium, and iodine are essential to building and repairing your teeth properly. Teeth are bones and should heal themselves, but because fluoride converts your teeth into fluorapatite- a mineral that is not biologically active in your body, it sabotages repair, even though it is slightly harder.

The argument that "well, we have a study from the 40s in Michigan" does not reconcile the fact that turning your teeth into something that is not teeth does not make them better at being teeth.