Negotiations at Cop29 in Baku, Azerbaijan were scheduled to finish on Friday evening but a final deal on climate finance remains elusive.

COPs have been getting progressively longer; the excellent team at Carbon Brief extrapolated the trend line, which suggests COP29 will end in the small hours of Sunday morning. Even that may be optimistic.

Fierce bargaining at UN climate talks in Azerbaijan dragged into Saturday after a $250 billion a year offer from rich nations was flatly refused by developing countries hardest hit by

The main goal of COP29 is to agree how much money richer developed countries will provide poorer developing ones to help them fight climate change.