Automobiles represent the most significant source of air pollution in urban areas. At the same time, the level of particulate-like pollutants in cities like Khorammabad and Ahvaz have other origins, springing from the exploitation of oil wells. Dust further contributes to issues of air pollution in Iran. How can air pollution be countered, and how can we lessen its intensity? What practical solutions can citizens carry out? This section of the class deals with these and other issues.