2.Trying to get the dilution of fixed local weather. To control the quality of air. The air that is encapsulated in the sewage. Released into the air without polluting the air or harmful.Control source location industry Transportation systems, and control the release of sewage into the air
.Three. Prevention and disposal of sewage. Material or other means instead. To avoid harmful toxins such as sulfur disposal of oil and coal used as fuel which produces. The dirty air