61. What is the name of the atmospheric phenomenon that causes the Southern Lights?
a) Ozone depletion
b) Greenhouse effect
c) Solar wind
d) Ionosphere
Answer: c) Solar wind
62. Which of the following is a common indoor air pollutant that can cause lung cancer?
a) Carbon monoxide
b) Nitrogen dioxide
c) Radon
d) Oxygen
Answer: c) Radon
63. What is the name of the atmospheric layer where most weather occurs?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: a) Troposphere
64. Which of the following is a common source of indoor air pollution?
a) Industrial emissions
b) Motor vehicle emissions
c) Tobacco smoke
d) Volcanic eruptions
Answer: c) Tobacco smoke
65. What is the name of the atmospheric layer where most commercial airplanes fly?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: b) Stratosphere
