Natural Treatment Systems are methods used to manage and treat wastewater using natural processes. These systems often involve the use of plants, soil, and microorganisms to filter and break down pollutants. Common examples include constructed wetlands and biofilters, which mimic natural ecosystems to improve water quality. These systems are typically more sustainable and environmentally friendly compared to traditional treatment methods. They can be designed to fit various scales, from small residential setups to larger community systems. By utilizing natural processes, they often require less energy and can enhance local biodiversity while effectively treating wastewater.