Zero Carbon Act enacted
Major win +2What happened
Passed the Climate Change Response (Zero Carbon) Amendment Act 2019: net-zero long-lived GHG emissions by 2050; biogenic methane targets (10% below 2017 by 2030; 24-47% by 2050); five-year emissions budgets; independent Climate Change Commission; requirement for Emissions Reduction Plans.
Why it matters
Created durable legal architecture for domestic climate policy - targets, budgets, independent advice, and planning.
Impact assessment
Structural, durable governance reform with binding domestic carbon budgets distinct from Paris NDC.
Scale: Economy-wide framework
Limitations: Methane target weaker than CO2 pathway; National signalled intent to amend when in office.
Attribution
shared (high confidence) -Labour, Greens
Labour-led reform; James Shaw (Greens) as Climate Change Minister; National supported passage but opposed methane target range.
Coalition period: Labour-led coalition (with NZ First) (26 October 2017 - 16 October 2020)