Here's a breakdown:
* Traditional Air Pollutants: These are substances that are harmful to human health and the environment when present in the air in high concentrations. Examples include:
* Particulate matter (PM): Tiny particles that can be inhaled and cause respiratory problems.
* Carbon monoxide (CO): A colorless, odorless gas that can reduce oxygen-carrying capacity in the blood.
* Sulfur dioxide (SO2): A gas that contributes to acid rain and respiratory problems.
* Nitrogen oxides (NOx): Gases that contribute to smog and respiratory problems.
* Ozone (O3): A gas that can damage lung tissue and contribute to smog.
* Volatile organic compounds (VOCs): Chemicals that can react to form ozone and other harmful substances.
* Other Substances: While not traditionally considered air pollutants, these can still have negative impacts:
* Water vapor (H2O): A natural component of the atmosphere but can contribute to humidity and extreme weather events.
* Carbon dioxide (CO2): A greenhouse gas that contributes to climate change.
* Nitrogen (N2): The most abundant gas in the atmosphere and is generally considered harmless.
Therefore, the answer is nitrogen (N2) is generally not considered to be an air pollutant. However, it's crucial to remember that even seemingly harmless substances can have adverse effects on the environment and human health in certain situations.
