Politicians and green advocates want to keep the focus on limiting global warming to 1.5C, even though scientists say the planet is already on track to soon breach the target.

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 p