Water fluoridation is supported by the World Health Organization, the World Dental Federation, and the United States Centers for Disease Control and Prevention. It is one of the most cost-effective ways to reduce tooth decay, and this is particularly important. It is relevant because when we come to investments in health—and, as you have seen in this Budget, the Government is committed to investing in health—it is important that we take all the most cost-effective investments so that we have more choices that we can make with our heavily constrained health dollar. Water fluoridation is so effective that the United States Centers for Disease Control and Prevention considers it listed amongst the top 10 achievements of public health. Actually, that's not quite right. They consider it amongst the top 10 achievements of public health in the 20th century and we have not yet routinely implemented it in New Zealand. We must do better. 