For more than 50 years, the city of Bozeman has added fluoride to the city's drinking water. A group by the name of Fluoride Free Bozeman wants to change that and has taken their argument to recent commission meetings. Debates over adding fluoride to water systems aren't new, but recent research by the E.P.A. on the impact of fluoride on the body and changes in the recommended dosing standards may cause significant changes in the nation's water supply. KGVO news spoke with Kriss Wolf, a spokesman for Fluoride Free Bozeman and this is what he had to say on the issue.