How long was chlorine researched for it's lethal, toxic, cancer causing effects before it was added to city waters
Anything in excess is toxic to our bodies. Chlorine has been found (in measured doses) to be beneficial to kill harmful bacteria in drinking water. Just as radiation can kill you, radiation in measured, precisely metered doses can help the body fight cancer. Yin and Yang. There must be balance. With too much of anything comes anarchy.
Drinking water additive should be Flouride not Chlorine. Chlorine should be for swimming pools