Yvo de Boer, the head of the UN Climate Secretariat, has warned that international action on climate is “stuck” despite the increasing urgency.

He says the failure of world leaders to agree on the issue means it is time for the UN to take the lead. De Boer is now pushing for a summit of world leaders to talk about what happens when the Kyoto Protocol expires in 2012.

“I feel it is so important to bring the question of climate change back to the UN process,” Mr de Boer said. “Back to the UN framework convention on climate change, where basically all of the interests can be addressed and you can find a solution for after 2012 that really does represent the diversity of use.”