本题目来源于试卷: Climate Change - Causes & Impacts，类别为 IB环境系统与社会
[单选题]
Figure: Causes and effec +i ehp zmv65yb0 k*8spts of 2 :m6rs m)ddqpair pollution 
Identify the two chemicals shown in the Figure that are also significant causes of the greenhouse effect and climate change.
A. Carbon dioxide and methane
B. Carbon dioxide and CFCs
C. Methane and CFCs
D. Sulfur oxides and nitrogen oxides
参考答案: A
本题详细解析:
Climate change is mostly attributed to the enhanced greenhouse effechb6fht1 5 o5gst created by the increase f6h55sh ogt 1bof greenhouse gases in our atmosphere. Carbon dioxide and methane are the two most common of these gases, so option B is correct. CFCs do contribute to air pollution but are more responsible for breaking down the ozone layer. Sulfur and nitrogen oxides are contributors to smog and acid rain but are not considered greenhouse gases and do not contribute to the effect causing climate change.
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