Sustainable NZ Party could work with National, Labour - Vernon Tava

The new political party that wants to challenge the Greens for votes has launched its website and is signing up members. While commentators have been calling it a potential "blue-green" or "teal" party, it's gone for a colour-free name - Sustainable New Zealand. It needs 500 financial members to register as a political party. Vernon Tava is the head of the new party. He talks to Susie Ferguson.