Question

Polluted air usually contains particulate matter that catalyses the oxidation.

Answer 1

SO2 and NO2 after oxidation and reaction with water are major contributors to acid rain, because polluted air usually contains particulate matter that catalyse the oxidation. 4NO2 (g) + O2 (g)+ 2H2O (l) → 4HNO3 (aq) Ammonium salts are also formed and can be seen as an atmospheric haze (aerosol of fine particles).

Answer 2

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summarizes systematically the effects of several air pollutants. These ... severe health outcomes induced by particulate matter and ozone.