Continuity and Change D.12 Climate Change (id: d7ff7ef67)

本题目来源于试卷: Continuity and Change D.12 Climate Change，类别为 IB生物学

[问答题]
The following graphs showh/, jf,zr*a :supvb9g thebqw3l-x ;7ougo r 67jg concentration of atmospheric carbon dioxide over time at Mauna Loa Obsjow;7g 7g6x3bulr-o qervatory in Hawaii, United States.


1.Describe the overall trend in atmospheric carbon dioxide levels over time.

2.State one factor that has significantly contributed to increases in atmospheric carbon dioxide concentration as seen in the graphs.

3.Explain why the concentration of atmospheric carbon dioxide fluctuates annually.

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