"New Zealand's clean-green image doesn't quite measure up when it comes to the state of our waterways. and one of the worst cases of deliberate pollution is Auckland's Manukau Harbour. But now something is being done about it". "Manukau tribes say drastic measures are needed to save the harbour before it is too late. As well as working for change within the system, they are also moving to regain their traditional role as kaitiaki, or guardians of the harbour".