The U.N. climate summit opened under a cloud of tension, with developing countries asserting leadership amid a pivot to Chinese-led green markets and the president of the talks accusing wealthy countries of indifference.
U.N. Climate Change Executive Secretary Simon Stiell said on Monday the 2015 Paris Agreement helped bend the curve of emissions downward, but the world still "must move much, much, faster" to cut planet-warming emissions and strengthen climate resilience.