After a few dozen Calgary residents protested against fluoride in the water, a council committee voted to end the city’s use of the additive in the water, which helps prevent cavities. A 10.5 hour public hearing was held Wednesday about fluoride, with the University of Calgary’s faculty of medicine offering to strike an advisory panel to review studies about it, the Calgary Herald reports. The committee rejected the offer but some say it may be reconsidered. A plebiscite brought in fluoridation in Calgary in 1991, and it’s now added to city water at 0.7 parts per million. Calgarians offered arguments, scientific research and opinions on each side of the divisive issue.