The formation of ____ begins when ultraviolet radiation (at wavelengths of about 0.31 m and below) dissociates some of the ozone into molecular oxygen and atomic oxygen.
a. water vapor
b. the hydroxyl radical (OH)
c. sulfur dioxide
d. acid rain
e. dry deposition
Question 2
What gas is produced naturally in the stratosphere and is also a primary component of photochemical smog in polluted air at the surface?
a. carbon dioxide
b. carbon monoxide
c. ozone
d. nitrogen dioxide
e. hydrocarbons
