Air pollution is an emerging environmental issue in major cities of Pakistan. In the year, 2004 – 2005, Pakistan achieved the growth rate over 8% especially in the service sector. This results rapid growth of infrastructure in cities together with growth in road transport. For the last few years, due to the liberal leasing system adopted by the financial institutions, the density of transport has increased many folds on the roads of Pakistan. The present cities roads infrastructure cannot cater the need of growing automobiles flow. The result is the worsening condition of ambient air quality in Pakistan cities.

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