Natural mitigation of pollution refers to the ability of natural processes to reduce or eliminate the harmful effects of pollutants in the environment. There are several ways in which natural systems can help to mitigate pollution:

1. Biodegradation: Microorganisms such as bacteria and fungi can break down pollutants in soil and water, converting them into less harmful substances.
2. Phytoremediation: Certain plants are able to absorb and detoxify pollutants from soil and water. For example, some species of plants are able to absorb heavy metals from contaminated soil, effectively cleaning up the environment.
3. Natural filtration: Soil and vegetation can act as natural filters, removing pollutants from water as it passes through the system.
4. Chemical reactions: Some pollutants can be chemically transformed or broken down by natural processes such as oxidation, hydrolysis, or reduction.
5. Dilution: In some cases, pollution can be diluted by the natural movement of water or air, reducing its concentration to levels that are less harmful.
6. Ecosystem services: Healthy ecosystems can provide a range of services that help to mitigate pollution, such as carbon sequestration, oxygen production, and the regulation of water quality.

Overall, natural mitigation of pollution can be an effective way to reduce the harmful effects of pollutants on the environment and human health. However, it is important to note that natural systems may not be able to completely eliminate the effects of pollution, particularly in cases of severe contamination. In these cases, human interventions may be necessary to clean up polluted environments and restore ecosystem health.