Question

What are the natural sources of air pollutants?

Answer 1

Air pollutants:

• Substances that contaminate the air are called air pollutants.
• Air pollutants cause air pollution in high concentrations.
• They can be solid particles such as particulate matter, liquid droplets such as acid rain, or gases such as carbon monoxide($\mathrm{CO}$), and sulphur dioxide (${\mathrm{SO}}_2$).
• Naturally occurring pollutants include ash, soot, sulphur dioxide, salt spray, volcanic, combustion gases, etc.
• These pollutants are released during volcanic eruptions, forest fires, and grass fires.
• Human-caused pollutants include naturally occurring pollutants released from human activity.
• They are released from coal, oil, and natural gas use, electric power plants, factories, and motor vehicles.