Should fluoride be added to drinking water?

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Evidence suggests that water fluoridation can help prevent tooth decay - yet some people are sceptical about adding fluoride to public water supplies. Claire Stevens, President of the British Society for Paediatric Dentistry, discusses the benefits and Catherine Carstairs, Professor of History at the University of Guelph in Canada, outlines the origin of the concerns. (Image: Boy drinking water, Credit: Getty Images.)