"These are people who have worked on it intensively, not just farmers, for a number of years now and they're being lectured by a bunch of people who haven't been here and have no understanding of a process that's been shown to be effective."
As Mr English was speaking, his senior spokesmen released National's plan for regional New Zealand.
Economic development spokesman Simon Bridges and primary industries spokesman Nathan Guy said voters had a clear choice between "two very different visions".
"Labour wants to hit our regions with new taxes that would slow New Zealand down, as well adding farmers to the Emissions Trading Scheme," they said.
"They want to risk our success through unclear policies and higher taxes, and that's not good enough."
Labour intends bringing farmers into the ETS during its first term, which means they'll have to pay for pollution, although 90 per cent of the cost will be carried by the government.
National's regional plan, released by Mr Bridges and Mr Guy, is:
- Raising family incomes and delivering more jobs
- Building the infrastructure to support growth in the regions
- Helping regional businesses grow
- Getting government finances in order
- Investing more in world-class public services for regional New Zealand
- A commitment not to impose new taxes