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Q.
Which of the following is a secondary pollutant?
NTA AbhyasNTA Abhyas 2022
Solution:
$O_{3}$ is a secondary pollutant. It is called a "secondary" pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs)