The Government announcing a range of environmental policy changes

It's setting science-based biogenic methane targets for 2050 - the range will be 14 to 24 percent below 2017 levels.

There will be a legislated review of the target in 2040, to ensure its aligns with science and against progress of key trading partners.

There will also be no tax on agricultural methane emissions and farmers will be able to measure their emissions with a new on-farm calculator.

Climate Change Minister Simon Watts, says the approach is clear - technology and partnership, not taxes, will deliver the reductions the country needs.