The scientific term for the process of cleansing the air in an ecosystem is bioremediation, particularly focused on the role of plants and microorganisms. These organisms help filter and break down pollutants, improving air quality. For instance, certain plants can absorb harmful gases and volatile organic compounds while microorganisms in the soil can metabolize contaminants into less harmful substances. This natural process not only enhances air quality but also contributes to broader environmental health, supporting biodiversity and ecosystem stability.