71. What is the name of the atmospheric layer that contains the ozone layer?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: b) Stratosphere
72. Which of the following is a common source of outdoor air pollution?
a) Industrial emissions
b) Motor vehicle emissions
c) Tobacco smoke
d) Radon
Answer: b) Motor vehicle emissions
73. What is the name of the atmospheric layer that contains the auroras?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: d) Thermosphere
74. Which of the following is a common indoor air pollutant that can cause headaches, nausea, and dizziness?
a) Carbon monoxide
b) Nitrogen dioxide
c) Carbon dioxide
d) Methane
Answer: a) Carbon monoxide
75. What is the name of the atmospheric layer that contains the highest concentration of ozone?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: b) Stratosphere
