The Greens are going to the court of public opinion on whether they should support the government's Emissions Trading Scheme.
The party is seeking feedback from the public ahead of a crucial caucus meeting next Tuesday when its MPs will decide for or against the ETS.
Greens Co-Leader Jeanette Fitzsimons says they are facing a difficult decision and they want public feedback before they make it.
"What really mattered about this scheme was that is was fair to New Zealanders and effective at reducing greenhouse gas emissions. Throughout the negotiation process we have kept this at the forefront of our minds. If we don't get these things right, the huge wealth transfers that the ETS creates will be both unfair and ineffectual," says Fitzsimons.
She says they have gained concessions in some areas, such as financial assistance for homeowners, but there has been no movement, and no prospect of it, on the introduction of transport and agriculture to the ETS.
"We have also made good progress on ensuring that the ETS does not lock our economy into old technology and that there is room for innovation," she says.
The government also needs New Zealand First's support to pass the legislation.