Hesam Shabaniverki - PhD candidate, Urban Planning, Lusofona University, Lisbon, Portugal
Mohsen Shabaniverki - B.S. student in Power System Engineering, Islamic Azad University, Abhar Branch, Zanjan, Iran
Leanne Thomas - Computer Science, Rensellaer Polytechnical Institute, USA
Hooman Babapoor - PhD candidate, Urban Planning, Lusofona University, Lisbon, Portugal

Today an important part of environmental study includes the study of air pollution and its sources. Since motor vehicles are one of most important contributors of air pollution in modern cities, a review of how they are utilized is important. One way of reducing air pollution, is by reducing the number of vehicles left idling instandby mode at the workplace. In this paper, we will examine the amount of pollution generated by public transportation buses inQazvin and provide methods for controlling pollution of these vehicles. We will express that many residual functions of publictransportation vehicles are not only unnecessary, but they are not economical and can do damage to the environment. General vehicles terminals are non-moving sources of pollution or contamination. This is another area in which air pollution can be reduced. Finally, we will estimate the concentration and flow ofbus pollution. The use of eco-refining and catalytic converters will also be considered during this case study.

Air Pollution, Sources of pollution, Terminals, Reduce pollution