The United Nations’ Conference of Parties (Cop) climate summits are “no longer fit for purpose” and require an urgent overhaul, climate experts and former UN chiefs have said.

Call for change comes after host country Azerbaijan's president calls oil and gas a 'gift of God'

For the third straight year, efforts to fight climate change haven't lowered projections for how hot the world is likely to get — even as countries gather for another round of talks to curb warming, according to an analysis Thursday.