The United Nations’ annual climate talks are pushing into overtime under a cloud of anger and disappointment as negotiators are well short of a deal on money for developing nations to curb and adapt to climate change.

UN climate talks looked set to overrun into the weekend as a deep gulf formed between richer and poorer countries over cash to help those most vulnerable in a warming world. Wealthier nations offered to more than double to $250bn a year the cash they give developing countries annually to fight climate change.

Negotiators at COP29 are trying to close the gap between the $1.3 trillion the developing world says is needed and the few hundred billion that richer nations have been prepared to pay.

A new draft of a deal on money to curb and adapt to climate change released Friday afternoon at the United Nations climate summit pledged $250 billion by 2035 from wealthy countries to poorer ones.