Consider four common air pollutants found in urban environments NO, SO 2 , Soot and O 3 . Among these which one is the secondary air pollutant?

GATE Civil Engineering (CE) 2011 Solved Paper

Question : 31 of 65

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Consider four common air pollutants found in urban environments NO, SO₂, Soot and O₃. Among these which one is the secondary air pollutant?

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