Most non-english-speaking developed countries have already stopped or banned water fluoridation. This includes Japan, Germany, Sweden, Netherlands, the former Czechoslovakia, the former USSR, and France. The only benefit of fluoride is a TOPICAL effect on the TOOTH ENAMEL. There are other effective and safer ways of preventing tooth decay. The harms of fluoride are systemic. Humans have no nutritional need for fluoride. There have been proper placebo-controlled trials on rats with fluoridated drinking water demonstrating many kinds of harms including behavioral abnormalities and visible changes to CNS structure. There have been many correlational studies showing that areas with 2-3ppm fluoride in drinking water have lower average IQs than similar areas with 0.3ppm fluoride. Typical amounts used in government mandated drinking water fluoridation are 0.7-1.3ppm. Fluoride is known to cause selective reduction in the number of nicotinic acetylcholine receptors. sources more sources NRC report