Two years after the Paris agreement, France's president has called together the world's financial and political leaders to come up with action to meet its goals, Radio New Zealand International's Dominic Godfrey reports.
Pacific leaders have long called for more financial commitment and innovation to avoid catastrophe.
Emmanuel Macron's main focus for the One World Summit is to determine how the financial sector can better support climate action.
The changes necessary will not pay for themselves and innovation is needed.
Fiji's Prime Minister Frank Bainimarama is among those in Paris pushing for improved climate finance.
He is on a panel of world leaders and innovators discussing ways to fund low carbon and climate adaptation projects.
At a summit side event, Marshall Islands President Hilda Heine will speak on making climate finance work for women.