Pre-cursors to photochemical oxidants are

1.	Pre-cursors to photochemical oxidants are
A.	NOX, VOCs and sunlight
B.	SO2, CO2 and sunlight
C.	H2S, CO and sunlight
D.	SO2, NH3 and sunlight
Answer» B. SO2, CO2 and sunlight

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Pre-cursors to photochemical oxidants are

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