New Zealand imported over 1.4 million tonnes of PKE in the 2010/2011 seasonal year (Statistics New Zealand), which is over a third of the global trade (which stands at 4.86 million tonnes, according to the United States Department of Agriculture Foreign Agricultural Service).
A report released by Greenpeace New Zealand in 2011 said that the PKE imported into New Zealand during that same dairy season produced up to 8.9 million tonnes of greenhouse gas emissions, equivalent to 12 per cent of New Zealand's entire annual greenhouse gas emissions. Yet Greenpeace does not know of a single dairy farmer in New Zealand who refuses to use PKE on environmental grounds.
Both Dairy NZ and Fonterra disagree with environmentalists who say that PKE is a co-product, rather than a waste product. Fonterra claims that PKE makes up just two percent of the revenue from oil palms, but that is still a large number.
Change is perhaps going to come from increased consumer awareness and demand. Barton says: "We have had feedback from customers that they would prefer food made without palm kernel. There is also an increasing body of science that grass-fed animals have higher Omega 3 levels."
Barton says that dairy farmers are facing a cost spiral. "In real terms they are earning less than they were 15 years ago. So they intensify. They're running more animals than they can grow grass for." But he says farmers have to take responsibility too. "The greenhouse gas issues associated with its [PKE] co-production need to be embedded in its end use."
Like what you see? For weekly Element news sign up to our newsletter.
We're also on facebook and Twitter.