Wetland to improve Lake Horowhenua's quality almost complete

One of New Zealand's most polluted waterways could lose its title thanks to a milestone reached in a years-long clean up. The first phase of a new wetland to help turnaround Lake Horowhenua's water quality is just weeks away from completion. For years, Levin's sewage was pumped into the lake. That stopped decades ago but the effects from that are still felt, as are the effects of excess nitrogen flowing into the lake, making its water harmful to humans. Jimmy Ellingham reports.