occurs when wastes dirty the make the air dirty. People produce most of the waste that cause . Such waste can be in the form of gases or be particulates (particles of solid or liquid manner). These substance result chiefly from burning fuel to power motor vehicles and to heat buildings. industrial processes and the burning of garbage also contribute to . Natural pollutants include ,pollen,soil particulates, dust, and naturally occuring gases. Also more causes of are forms of transportation such as automobiles,airplanes,ships, and ....