Question at position 30 What does not cause smog?NOxParticulatesO3CO2Clear my selection

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Question restated: What does not cause smog? Options: NOx, Particulates, O3, CO2.
First, consider NOx: This pollutant is a key precursor in the formation of ground-level ozone and other smog components; in sunlight, NOx participates in reactions that generate ozone, so it is indeed a cause of smog.
Next, evaluate Particulates: Fine particles from combustion and industrial processes contribute to smog by scattering light (haze) and often carrying adsorbed pollutants; they are a well-established smog constituent and degrade air quality.
Then, examine O3 (ground-level ozone): Ozone at the surface is a principal component of smog, formed when NOx and VOCs react under sunlight; it causes respiratory irritation and other health effects, confirming its role in smog.
Now, assess CO2: Carbon dioxide is a greenhouse gas primarily associated with climate change rather than the classic smog mix; it does not directly participate in the photochemical reactions that generate smog, and it does not form the visible hazy or particulate components that characterize smog. While CO2 is important for climate, it is not a primary smog precursor.
Collectively, the options NOx, Particulates, and O3 are all linked to smog formation, whereas CO2 does not function as a smog-causing agent in the typical sense. The statement stands that CO2 does not cause smog, distinguishing it from the other listed factors.

Question at position 30 What does not cause smog?NOxParticulatesO3CO2Clear my selection

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