One example of a biodegradable pollutant is sewage. Sewage is the wastewater that contains human and household wastes, such as food scraps, soap, and other organic matter. Biodegradable means that the pollutant can be broken down or decomposed by natural processes, such as by bacteria and other microorganisms.
In the case of sewage, bacteria in the environment can break down the organic matter and convert it into simpler, less harmful substances like water, carbon dioxide, and other minerals. These natural processes help to reduce the negative impact of sewage on the environment and make it less harmful to living organisms. However, it is important to note that even biodegradable pollutants like sewage can cause harm to the environment and human health if they are not properly treated or disposed of.