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联合国秘书长古特雷斯和英国首相约翰逊20日均敦促发达国家兑现每年提供至少1000亿美元帮助发展中国家应对气候变化挑战的承诺。目前，气候变化带来的挑战加剧已成各方共识，但在进一步加码减排承诺进行应对方面还缺乏进展。古特雷斯呼吁加快行动，力争到2030年将全球碳排放总量减少至2010年的55%。敦促兑现千亿美元支持承诺古特雷斯20日与约翰逊共同召集了一个非正式领导人气候圆桌会议。 ....

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