Qurratulain, Tahira Shams and Dr. Mahmood. A. Khwaja
Depending upon natural phenomena and human activities, the ambient air may contain a number of pollutants, harmful not only to human health (especially vulnerable population children, elderly, sick) but also to animals and plants. Manufacturing processes and the burning of fossil fuels has directly impacted ambient air quality, by releasing a high level of chemical pollutants into the atmosphere. To safe guard public health from poor ambient air quality, Pakistan national ambient air quality standards (AAQSs) have long been formulated and reviewed from time to time.