How does the atmosphere clean itself of pollutants?

The atmosphere cleans itself of pollutants primarily through processes like precipitation, adsorption, and chemical reactions. Rain and snow can wash away airborne particles and gases, effectively removing them from the atmosphere. Additionally, certain pollutants can be neutralized or transformed into less harmful substances through chemical reactions with natural compounds, such as hydroxyl radicals. Together, these processes help maintain air quality and reduce the concentration of harmful pollutants over time.