31 mars 1945 - Fluoride Added to Water
Description:
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.Ajouté au bande de temps:
Date:
31 mars 1945
Maintenaint
~ Il y a 80 ans