ACT remaining firm on demanding New Zealand renegotiate the Paris climate agreement, or quit it.
It wants a better methane deal, and says we should otherwise walk away.
But National leader Chris Luxon says remaining in the pact is a bottom line for his party.
Leader David Seymour says we're likely to miss the 2030 target, so the issue must come to a head soon.
"You have to negotiate when reality comes calling, and as he himself said this morning - three-quarters of the countries in the Paris Agreement aren't on track to meet their commitments."
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