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प्रश्न
Example of secondary pollutants.
पर्याय
Smog
O3
PAN
All of these
MCQ
उत्तर
O3
Explanation:
Ozone, which is generated when hydrocarbons (HC) and nitrogen oxides (NO2) combine in the presence of sunlight, NO2, which is formed when no oxygen in the air combines, and acid rain are examples of secondary pollutants.
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