The G20 summit in Rio de Janeiro kicked off on Monday with an unexpected breakthrough as members issued a final declaration on the first day of talks, though it only included broad statements on the conflicts in the Middle East and Ukraine.

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.