Correction: A previous version of this article incorrectly framed the broadcast as a debate. While both Huriwai and Mackle appeared on AM on May 2, they never spoke to one another nor engaged in a 'head-to-head' as was suggested.
A new documentary is making waves by questioning one of New Zealand's biggest industries.
Milked sees young activist Chris Huriwai, raised in the rural community of Ōtaua, looking to make sense of the conflicting claims coming from both the dairy industry and environmental protection camps.
Is New Zealand dairy farming really the most sustainable and efficient in the world, as dairy giant Fonterra claims, or is that just greenwashing over the true ecological cost of business?
Co-producer of the film Huriwai and Dairy NZ CEO Tim Mackle both gave their takes on the issue on AM on Monday.
Watch the full video above.