Which of the following statements is true?

A.In the upper atmosphere, carbon dioxide acts as a thick, heat-trapping blanket. B.It is the build-up of CO2 that causes climate change and heats up Earth"s surface. C.Yearly emissions of carbon dioxide levels have grown about 20 percent since 1980. D.The build-up of carbon dioxide leads to the surge of night-shining clouds.

时间:2023-09-27 19:32:06

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