Atmospheric stability and wind conditions control
A) the quantity of pollution emitted into the atmosphere from industrial and mobile sources.
B) the vertical and horizontal dispersion of pollutants.
C) the rate of photochemical reactions taking place.
D) the increased use of fuel for heating or cooling.
Question 2
According to the Environmental Protection Agency, this is the most important agent of photochemical smog: ________.
Fill in the blank(s) with the appropriate word(s).