Which of the following best illustrates a secondary air pollutant?
A. CO2, released from the burning of coal
B. NO2, released from the burning of oil.
C. Ozone produced in photochemical smog.
D. None of the above
Answer:C
Which of the following best illustrates a secondary air pollutant?
A. CO2, released from the burning of coal B. NO2, released from the burning of oil. C. Ozone produced in photochemical smog. D. None of the above