Which one of the following gases is considered an atmospheric pollutant?

Correct answer: (e) None of the above/More than one of the above

Explanation

Sulphur dioxide (SO2) and ozone are considered atmospheric pollutants. They can affect both health and the environment. Short-term exposure to sulphur dioxide (SO2) can harm the human respiratory system and cause breathing difficulties. The largest source of sulphur dioxide (SO2) in the atmosphere is the burning of fossil fuels in power plants and other industrial activities. Ground-level ozone, or tropospheric ozone, is a secondary pollutant. It is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) released from vehicles, industries, and power plants react in the presence of sunlight.