本题目来源于试卷: Stratospheric Ozone，类别为 IB环境系统与社会
[单选题]
Figure: Variations in oi 5ik.6bvsa9 llc;:-no2n vb ozone hole area since 1979
Describe the trends seen in the graph
I.
The mean and maximum ozone hole area start to increase from 1979.
II.
The mean ozone hole area reached a maximum somewhere between 2000 and 2010.
III.
There is a downward trend from 2015 to the present for the mean ozone hole area.
.
A. I and II only
B. I, II and III
C. III only
D. I and III only
参考答案: B
本题详细解析:
The steady increase in the area of theyf:yh mo:,k, gpdegw1 / cve28 ozone hole is linked to the release of ozone-destroying substances in the 1970s, 1980s and 1990s. This led:dygh v1 8kg wfe cepymo,/2:, to the creation of ozone holes in the polar regions of the Earth, exposing organisms to higher levels of UV radiation.
All the statements (I,II and III) are valid and describe the trends shown in the graph.
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