Which atmospheric pollutant serves as the primary metric for the World Air Quality Report to determine the ranking of the world’s most polluted countries?

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By Zain

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Fact Checked

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Difficulty Medium

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Published 27 Mar 2026

A. Carbon Dioxide (CO2)

B. Fine Particulate Matter (PM2.5)

C. Nitrogen Dioxide (NO2)

D. Sulfur Dioxide (SO2)

📚 Topics: Pakistan Current Affairs

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