Heads of state arriving in Rio de Janeiro on Sunday for the G20 summit will spend Monday and Tuesday addressing issues from poverty and hunger to the reform of global institutions. Still, the ongoing U.N. climate talks have thrown a spotlight on their efforts to tackle global warming.

United Nations talks on getting money to curb and adapt to climate change resume Monday with fresh hope that negotiators and ministers can work through disagreements and hammer out a deal after slow progress last week.

Britain's Prime Minister Sir Keir Starmer and other leaders of the G20 pose for a photo of the Global Alliance Against Hunger and Poverty at the G20 summit at the Museum of Modern Art in Rio de Janeiro,