National, Labour, the Green Party and Act have not yet released their policies, but we ran a ruler over their public statements, along with the policies that have been released by New Zealand First, the Maori Party and The Opportunities Party, to look at some key issues:

• What they would do with the Emissions Trading Scheme.
• Their approach to dealing with biological emissions from agriculture, which make up nearly half New Zealand’s total emissions.
• Whether they support the establishment of a climate commission, carbon budgeting and the proposed Zero Carbon Act.
• The emissions reduction targets they would set for New Zealand.