The main precursors of winter smog are
A. N2O and hydrocarbons
B. NOx and hydrocarbons
C. SO2 and hydrocarbons
D. SO2 and ozone
Answer:B
The main precursors of winter smog are
A. N2O and hydrocarbons B. NOx and hydrocarbons C. SO2 and hydrocarbons D. SO2 and ozone