The National Party is suggesting creating a new national park on the boundary of Otago and Southland.
The party released its first policy discussion document of the year on Saturday, focusing on the environment. Leader Simon Bridges said the party would manage the environment and the economy together.
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"National's ambition is to be the party that is best able to deliver a clean environment with a strong economy. It doesn't have to be one or the other," he told supporters in Raglan.
"We know we can deliver a better environment without imposing a whole series of unneeded environmental taxes."
The suggestions focused on four areas - environment, climate change, conservation and biotechnology.
A new national park in the Catlins was proposed as New Zealand's 14th national park.
The Catlins Forest Park is a bit over an hour's drive outside of Invercargill, and 1.5 hours from Balclutha.
Other suggestions in the document include changing New Zealand's rules around biotechnology, adopting a container recycling scheme, creating standards for coastal water quality and measures to encourage the use of electric vehicles.