The new UN climate chief says nations have no choice but to join forces to stop global warming, even after her predecessor said he doubts sufficient climate goals will be set by 2020.
Christiana Figueres was appointed last month to replace Yvo de Boer as head of the United Nations Framework Convention on Climate Change. On Monday, de Boer said the UN's negotiation process was unlikely to deliver "adequate mitigation targets in the next decade".
Still, Figueres told reporters at a UN climate conference on Wednesday "there is no other option" but to meet the challenge of cutting greenhouse gas emissions enough to prevent drastic climate change.
She says the Copenhagen climate summit had some positive results even if it was "full of errors from which we can learn".