Energy Minister Pete Hodgson says New Zealand will continue to strive for limits on greenhouse gas emissions, despite a backdown by Australia.
Mr Hodgson was responding to weekend reports that Australia will now not ratify the Kyoto Protocol, which requires developed countries to reduce greenhouse gas emissions by 2008-2012.
Talks on the 1997 treaty stalled at The Hague in November when the United States refused to ratify it.
President George W. Bush confirmed that decision in March.
Mr Hodgson said Australia's decision that it would not ratify the protocol, if accurately reported, was premature.