66. Which of the following is a common secondary air pollutant that forms from the reaction of sunlight with nitrogen oxides and volatile organic compounds?
a) Carbon monoxide
b) Nitrogen dioxide
c) Ozone
d) Sulfuric acid
67. Which of the following is a common indoor air pollutant that can cause respiratory problems and eye irritation?
a) Carbon monoxide
b) Nitrogen dioxide
c) Formaldehyde
d) Oxygen
68. What is the name of the atmospheric layer where the Earth’s magnetic field interacts with solar wind particles?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Ionosphere
69. Which of the following is not a common indoor air pollutant?
a) Carbon monoxide
b) Nitrogen dioxide
c) Carbon dioxide
d) Sulfur dioxide
70. Which of the following gases is the most abundant in Earth’s atmosphere?
a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Water vapor
