Natural filtration is a process where water is purified through natural materials and ecosystems. This can occur in environments like wetlands, where plants and soil work together to remove impurities and contaminants from water. The natural filtration process helps maintain clean water sources and supports biodiversity. In addition to wetlands, other natural systems, such as forests and sand dunes, also contribute to water filtration. As water flows through these environments, it is filtered by layers of soil, rocks, and vegetation, which trap pollutants and improve water quality. This process is essential for sustaining healthy ecosystems and providing clean water for human use.