Fluoride
Full disclosure, I am now very much against fluoride.
Here is a video to get you started about water fluoridation
http://m.youtube.com/?client=mv-google&rdm=mjywbl7ov&ytsession=mvVjtIa_1CQbhMrsEUcXiwv9WI34loAJCwEcfZTnlB0XrV2GmRPdARWh9GXSSda90ZWP9_bXg6n5y0huwYkrhXwtwXMJXERTpAk9Tk7GlcHFqSzpcYWxlTa23X5weweeFGHZj_rMC_8GhBrtHf0Ki_z30qQER9OTwyXKEDr9F-8CEtDMhRpR3vBBWy--WG3ygDocBUgo8nZp8e9Qo54dho-7pevIzOXqnfIIvMiPhqxIxExDtlARptlxR78-Sr1D_32edh34EUu6-CL-irwgvJ7aCQI-ZeVBJQJRomFYcM#/watch?v=_Ys9q1cvKGk&desktop_uri=%2Fwatch%3Fv%3D_Ys9q1cvKGk
A very good article worth a read that will explain potential benefits and dangers of fluoridation.
http://www.healthfirstdental.com/articles/scientific-american.pdf
Here is a video to get you started about water fluoridation
http://m.youtube.com/?client=mv-google&rdm=mjywbl7ov&ytsession=mvVjtIa_1CQbhMrsEUcXiwv9WI34loAJCwEcfZTnlB0XrV2GmRPdARWh9GXSSda90ZWP9_bXg6n5y0huwYkrhXwtwXMJXERTpAk9Tk7GlcHFqSzpcYWxlTa23X5weweeFGHZj_rMC_8GhBrtHf0Ki_z30qQER9OTwyXKEDr9F-8CEtDMhRpR3vBBWy--WG3ygDocBUgo8nZp8e9Qo54dho-7pevIzOXqnfIIvMiPhqxIxExDtlARptlxR78-Sr1D_32edh34EUu6-CL-irwgvJ7aCQI-ZeVBJQJRomFYcM#/watch?v=_Ys9q1cvKGk&desktop_uri=%2Fwatch%3Fv%3D_Ys9q1cvKGk
A very good article worth a read that will explain potential benefits and dangers of fluoridation.
http://www.healthfirstdental.com/articles/scientific-american.pdf