Question

Which of the following about the ozone layer is not true?
a.
The ozone layer is formed in the stratosphere.
b.
The ozone layer helps sustain life by absorbing a large amount of incoming UV radiation.
c.
Ozone in the troposphere is beneficial to living organisms.
d.
Depletion of the ozone layer can lead to an increase in skin cancer.

Answer 1

Answer: c

Explanation: Stratospheric ozone (the ozone layer) is beneficial because it absorbs harmful UV radiation. By contrast, ozone in the troposphere (ground-level ozone) is a pollutant — a component of smog that damages respiratory health and plants — so it is not beneficial.