Air pollution is one of the problems facing the world. Iran is one of the most polluted cities in the world. Major cities in Iran like Tehran have been ranked among the most polluted cities in the world. Air pollution in Iran is contributed by different factors among them the stationary and mobile sources. Mobile sources, including the motor vehicles contributed to more than 80% of air pollution in Iran. Air pollution in the country has lead to increased number of health conditions including respiratory illnesses. The country has taken different strategies aimed at reducing air pollution but all of them do not work right because they are not well enforced. Therefore, to reduce air pollution in Iran, there need to be an enforcement mechanism that ensures that all problems are tackled right from their roots.