(Sam McNeil | AP file photo) In this Nov. 28, 2019, photo, smoke and steam rise from a coal processing plant in Hejin in central China's Shanxi Province. Chinese President Xi Jinping says his country will aim to stop pumping additional carbon dioxide, the main global warming gas, into the atmosphere by 2060. Xi's announcement during a speech Tuesday, Sept. 22, 2020, to the U.N. General Assembly is a significant step for the world's biggest emitter of greenhouse gases and was immediately cheered by climate campaigners.
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