Act's policy would mean they would work an extra day in Wellington – either Monday or Friday.

"Parliamentarians could take one simple and costless action to help the climate and save the taxpayer significant money," Seymour said.

In addition to saving taxpayers' money and reducing overall air travel, Seymour said it would also help with MPs work/life balance.

"Spending fewer weeks, but the same number of days, in Wellington, and less time travelling, would reduce the time pressure on MPs, leaving more time to be productive at work and home."

Act also wants to tie New Zealand's carbon price to the prices paid by the country's top five trading partners and remove all subsidies for commercial forestry investment.

"Subsidies have given large forestry investors an unfair advantage which is driving small farmers out," the party's policy said.

"Farm sales have gone beyond marginal land, with productive farmland being sold off to overseas investors."

Act has also proposed stopping councils from obtaining consents to spill raw sewage into streams and rivers, and apply to councils the same set of rules that businesses and farmers must follow.