求翻译：但是哪些国家应该减少排放？该减排多少呢？比如，经济高速增长的中国最近已经超过美国成为最大的二氧化碳排放国(译注，链接文章中的图见下，卫报)。但在历史上，美国排放的温室气体最多，远超过中国。而且，中国的人均排放量仅为美国的四分之一左右。是什么意思？

But which countries should reduce emissions? The emission reduction much? For example, rapid economic growth China has recently surpassed the United States as the largest emitter of carbon dioxide (Annotation, the linked article below, The Guardian). But in the history of U.S. greenhouse gas emissio

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