Ozone is a necessary,protective component of the ________,but is considered a pollutant in the ________.
A)troposphere, upper atmosphere
B)troposphere, air
C)photochemical smog, air we breathe
D)upper atmosphere, troposphere
E)air we breathe, upper atmosphere

Question

Quizplus · Accepted Answer

Ozone is a necessary, protective component of the upper atmosphere (specifically the stratosphere), where it shields the Earth from harmful ultraviolet radiation. However, when ozone forms in the troposphere (the lower part of the atmosphere where we live and breathe), it is considered a pollutant and a major component of photochemical smog.

Ozone Is a Necessary,protective Component of the ________,But Is Considered