The U.N.'s climate chief called on leaders of the world's biggest economies on Saturday to send a signal of support for global climate finance efforts when they meet in Rio de Janeiro next week, to help trigger a deal at COP29 talks.

Half way through the UN climate conference, the UN climate chief looked ahead to the gathering of the Group of 20 (G20) powers and issued a dire warning about the outlook for the globe unless changes are made.

The UN climate chief called on leaders of the world's biggest economies on Saturday to send a signal of support for global climate finance efforts when they meet in Rio de Janeiro next week, to help trigger a deal at COP29 talks.

The plea, made in a letter to G20 leaders from UN Framework Convention on Climate Change Executive Secretary Simon Stiell, comes as negotiators at the COP29 conference in Baku struggle in their negotiations for a deal intended to scale up money to address the worsening impacts of global warming.

The UN's climate chief urged G20 leaders on Saturday to push COP29 talks towards a deal to raise money for developing nations as diplomats struggled to find common ground in marathon negotiations.Samir Bejanov,