The Green Party says the Government should use its presidency of the United Nations Security Council to highlight the threat climate change poses to peace and security.
New Zealand is chairing the Security Council this month.
Green Party's global affairs spokesperson Kennedy Graham said New Zealand has already made the security of small island states the subject of the Open Debate later this month.
He said the biggest threat to the security of small island states is climate change.
Mr Graham said this needs to be highlighted before the Conference on Climate Change in Paris at the end of the year.
"It's a defining year - 2015, we can not afford to fail again. We can not afford to get it wrong.
"And if we don't do it, then the survival of small island states is really at stake."
Mr Graham said New Zealand stood with its Pacific neighbours in rejecting nuclear testing, and it's time to do it again on climate change.