31 mar 1945 año - Fluoride Added to Water
Descripción:
Fluoridation of community water began in 1945 in the US and became widespread in the following years. By 2012, approximately 75% of the US population was drinking water containing sufficient levels of Fluoride to prevent tooth decay.Añadido al timeline:
fecha:
31 mar 1945 año
Ahora mismo
~ 80 years ago