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.

Azerbaijani leader Ilham Aliyev has been praising fossil fuel and taking shots at geopolitical rivals, casting a cloud over the climate summit.

The United Nation's climate chief urged G20 nations on Saturday to push COP29 negotiations toward a deal to raise money for developing nations, warning there was a "long way to go." Negotiators worked through the night to narrow their differences at the U.

Countries at the COP29 summit tried to make progress on how to raise up to $1 trillion in climate finance for the world's most vulnerable, as political tensions overshadowed the talks and Argentina on Thursday pulled its delegation from Baku.

Cop29: UN climate talks 'no longer fit for purpose' say key experts - Letter from senior figures says the COP process has achieved much, but now needs an overhaul