本题目来源于试卷: Continuity and Change D.12 Climate Change，类别为 IB生物学
[单选题]
Which statement is not trux-uprqg cnm2d(2src ) yzv.+c8 pd,2me regardin,cq;046mu9bl-lmj:mo j ;x o o .bmesmg greenhouse gases?
A. Heat is not trapped equally by all greenhouse gases.
B. The greenhouse effect resulting from naturally occurring greenhouse gases is needed for life on Earth.
C. Sulfur dioxide is a greenhouse gas.
D. Methane is more potent than carbon dioxide in trapping heat energy.
参考答案: C
本题详细解析:
Sulfur dioxide (Choice C) is not a greenhouse gas. It is a pollutant in the atmosphere resulting mainly from the combustion of coal and causes acid rain. It is true that heat trapped by different greenhouse gases varies (Choice A). Some gases trap more heat than others and the average time that these gases stay in the atmosphere varies as well. Greenhouse gases are necessary because they increase the temperature of the earth to a level (Choice B) required by organisms to survive on Earth. Methane is more potent than carbon dioxide by almost 20 times but stays in the atmosphere for a shorter time compared to carbon dioxide (Choice D).
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