How is ozone created?

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试卷: LEED GA模拟题D[查看]
How is ozone created?
A: Emissions from factories
B: Transportation emissions
C: Sunlight-driven chemical reaction between molecules
D: Emissions from incinerators

参考答案: C

本题解释:
Notes:

Reference: N/A

ozone: (O3) is a gas composed of three oxygen atoms. It is not usually emitted directly into the air, but at ground-level is created by a chemical reaction between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight. Ozone has the same chemical structure whether it occurs miles above the earth or at ground-level and can be \'good\' or \'bad,\' depending on its location in the atmosphere. (EPA)