What impact do estuaries have on pollution levels?

Estuaries play a crucial role in mitigating pollution by acting as natural filters for runoff from land before it enters the open ocean. They trap sediments, nutrients, and contaminants, which can be broken down or absorbed by the diverse ecosystems present, such as wetlands and mangroves. However, excessive pollution can overwhelm these systems, leading to degraded water quality and harm to aquatic life. Overall, healthy estuaries help improve water quality and reduce the impact of pollutants on coastal environments.