Commonwealth leaders meeting in Malta have agreed to send a clear signal of the need for deep cuts in global greenhouse gas emissions.
In a statement on climate action issued after the leaders' retreat yesterday they said the climate change challenge could only be met by an urgent global response.
The statement comes just before a key summit is convened in Paris to try to reach a global consensus on climate change and emissions reduction targets.
The Commonwealth statement stressed the disproportionate burden on least-developed countries and small island states of climate change impacts and the need to assist them.
Prime Minister John Key is at the Commonwealth Heads of Government Meeting (CHOGM).
Following CHOGM, Mr Key will travel to Paris to attend the UN climate change conference. He returns to New Zealand on December 3.