本题目来源于试卷: IB ESS Unit 1 Foundations of ESS，类别为 IB环境系统与社会
[单选题]
Identify which of the1; ) cwm8xeid3mdjyf) :z8 plo l5qa5efollowing is not considered a pollutant.
A. Light
B. Natural gas
C. Invasive species
D. Sewage
参考答案: B
本题详细解析:
A pollutant is something humans add to+yi( pj;o3ng b7iqm 4j the environment that has an impact on the organisms in t 3io7 nijj +m4p(yqb;ghe environment, and that cannot be broken down faster than the rate at which it is being added.
Natural gas itself is not a pollutant unless it is combusted to form Carbon Dioxide. Option A is a pollutant in many circumstances, including in cities at night. Option C is considered a pollutant to ecosystems it is not native to. Option D is considered pollution in both soil and water.
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