Since President Xi Jinping took power in China 18 months ago, the world has sometimes fretted about the ways in which the Asian country seems determined to use its newfound political and economic heft.
Beijing can seem to take an uncompromising and zero-sum view of the world. In the western Pacific, China has unsettled its neighbours by making territorial claims. Relations with the US have been overshadowed by concerns over Chinese cyber espionage.
But in one area of critical importance to the world — the need to combat climate change — China has taken a much more co-operative stance.
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