Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth. As early as 1896 scientist

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问题 Global warming refers to the average temperature of the atmosphere, oceans, and landmasses of Earth.
As early as 1896 scientists suggested that burning fossil fuels might change______.

选项

答案the composition of the atmosphere

解析 参见第4个小标题MEASURING GLOBAL WARMING下面第1句:As early as 1896 scientists suggested that burning fossil fuels might change the composition of the atmosphere。
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