Wellington sewage overflow potential 'catastrophe' - biologist

About 70 million litres of untreated waste is now being pumped 1.8 kilometres out into Cook Straight after the Wellington Moa Point treatment plant failed. The capital's south coast beaches are currently off limits because of contamination. Environmentalists are concerned about the nearby by Taputeranga Marine Reserve and wider eco system. Dr Christopher Cornwall, a senior lecturer in Marine Biology at Te Herenga Waka-Victoria University of Wellington spoke to Lisa Owen.