Photo chemical smog formed in congested metropolitan cities mainly consists of ………………….
A. Ozone, SO2 and hydrocarbons
B. Ozone, PAN and NO2
C. PAN, smoke and SO2
D. Hydrocarbons, SO2 and CO2
Answer:B
Photo chemical smog formed in congested metropolitan cities mainly consists of ………………….
A. Ozone, SO2 and hydrocarbons B. Ozone, PAN and NO2 C. PAN, smoke and SO2 D. Hydrocarbons, SO2 and CO2