Andalusia PAU Geology And Environmental Sciences Practice Questions - Andalusia PAU Geology And Environmental Sciences Exam (Geología Y Ciencias Ambientales) Exam

Which of the following atmospheric pollutants is classified as a primary pollutant rather than a secondary pollutant?

Ground-level ozone (O3) Sulfur dioxide (SO2) Peroxyacetyl nitrate (PAN) Sulfuric acid mist (H2SO4)

Correct Answer:

Sulfur dioxide (SO2)

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