National's pledging to unleash the renewable energy sector.

The party's announced a new policy to reduce carbon emissions and double the amount of renewable energy in New Zealand.

It focuses on increasing renewable electricity generation to replace coal, gas and petrol-fuelled transport.

Plus, there's a particular focus on natural resources including solar, wind, and geothermal.

National's Infrastructure Spokesperson Chris Bishop told Andrew Dickens it means we can electrify our economy.

"It means we can drive cars that will be electric, go on electric buses, trains and ferries," he said. 

"[It will also mean] we can convert industrial processed heat into electric energy as well."