Fluoride is an acidic industrial waste injected into water supplies. Steve Roark explains to David Tulis of Hot News Talk Radio the damage fluoride causes to a water plant near Chattanooga. North West Utility District board members ask public input on whether they should halt fluoride treatments. David Tulis urges you to send the board an email via nwud.net before July 19. (Courtesy AM 1240 Hot News Talk Radio)