Calgary has made the decision to reintroduce fluoride into its drinking water supply, responding to public demand and concerns over the declining dental health of children. The move marks a reversal of a 2011 policy that had eliminated fluoride from the city’s water, a decision that was later reversed by residents through a vote. Studies have indicated that the removal of fluoride was linked to worsened dental health outcomes among children, prompting the city to take action to address the issue.