France, Nov. 18 -- Diplomatic tensionsover global warming will take centre stage at the G20 summit that opens in Brazil on Monday, as leaders of theworld's 20 major economies hope to break the deadlock over climate finance at UN talks in Azerbaijan.

Heads of state who arrived in Rio de Janeiro on Sunday for theG20 summit will spend Monday and Tuesday addressing issues frompoverty and hunger to the reform of global institutions.

However,the ongoing UN Cop29 climate talks in Baku, Azerbaijan have thrown a spotlight on theirefforts to tackle global warming.

While the Cop29 summitis tasked withagreeing a goal to mobilise hundreds of billions of dollars for theclimate, leaders of the Group of 20 major economies half a worldaway in Rio are h...