UNITED NATIONS, Feb. 21 (Xinhua) -- UN Secretary-General Antonio Guterres said on Thursday that he will convene a summit in September to "mobilize action, partnerships, financing" on climate change.

In his remarks at an annual parliamentary hearing, the UN chief said that the most important systemic risk the world face today is climate change, and it is worse than scientists had foreseen.

"Climate change is running faster than we are," and "political will unfortunately is slowing down," said the secretary-general.

Nevertheless, the approval of the work program of the Paris Agreement showed that it is still possible to bring together different countries with different views and agree on the basis to move forward, he said.

On the Sustainable Development Goals, Guterres urged developed countries to deliver on the promise and pledges of the Addis Ababa Action Agenda.

"Financing is critical, but so also is good governance and oversight, and in oversight parliaments play a critical role," he added.