As we approach the halfway mark of the UN Climate Change Conference or COP29 in Azerbaijan, a group of former leaders and climate experts has published a critical open letter highlighting what has so far been a fractious summit that has made little progress.

Developing countries need at least $1 trillion per year by the end of the decade to cope with climate change, economists told U.N. talks in Baku, where early efforts to reach a finance deal risk being overshadowed by diplomatic rows.

"You owe us!" screamed a protest banner at the COP29 summit in Azerbaijan, where negotiations over how much rich nations most responsible for climate change should pay poorer ones are