Name which one of the following gas is not pollutant?

Explanation

Among sulfur dioxide (SO2), carbon monoxide (CO), carbon dioxide (CO2), and nitrogen dioxide (NO2), carbon dioxide (CO2) is not typically considered an air pollutant in the same sense as the others.Carbon dioxide is a naturally occurring gas in the Earth's atmosphere and is essential for life on Earth. It is produced through natural processes such as respiration and volcanic eruptions, as well as human activities such as combustion of fossil fuels and deforestation. While carbon dioxide is a greenhouse gas and contributes to climate change when present in excessive amounts, it is not directly toxic to humans at typical ambient concentrations.On the other hand, sulfur dioxide, carbon monoxide, and nitrogen dioxide are all considered air pollutants due to their harmful effects on human health and the environment.