Early Edition with Kate Hawkesby

There are calls to replace aging underground pipes in Christchurch. An Otago University study has found evidence of asbestos fibres being released by aging underground pipes across the whole city, but the amounts detected don't exceed levels of concern for human health. Study co-author Dr Sarah Mager says it was concerning to find some of the pipes pre-date 1950. She says by global standards many of these pipes would be considered to be well past their prime. LISTEN ABOVESee omnystudio.com/listener for privacy information.