...2-8'B~7 Standardization of water supplies by addition of fluoride to bring the concentration to 1 ppm has proved to be a safe, economical, and efficient way to reduce the incidence of tooth decay — a very important nutritional public health measure in areas where natural water supplies...

...mg/liter has proved to be a safe, economical, and efficient way to reduce the incidence of tooth decay - a very important nutritional public health measure in...natural water supplies contain less than this amount. Another study which indicates beyond a reasonable doubt that fluoridation is safe is "Pathological...