Filtration systems are designed to remove impurities and contaminants from various substances, such as air or water. They work by passing the substance through a filter, which traps unwanted particles while allowing clean material to flow through. Common examples include water filters used in homes and air purifiers that improve indoor air quality. These systems are essential for maintaining health and safety. For instance, industrial filtration systems help protect machinery by removing dust and debris, while aquarium filters keep fish tanks clean and healthy. Overall, filtration systems play a crucial role in ensuring that we have access to clean resources.