Pakistan ranked world’s second most polluted country — IQAir study 

ISLAMABAD: Pakistan was the world’s second most polluted country after Bangladesh, IQAir, a Swiss group that measures air quality levels based on the concentration of lung-damaging airborne particles known as PM2.5, said on Wednesday.
South Asia is the most polluted region in the world with Bangladesh, India and Pakistan sharing 42 of the 50 most polluted cities worldwide, IQAir said in its 2020 World Air Quality Report, with data gathered from 106 countries.
“The most polluted countries in the region have numerous cities that average US AQI measurements of “Unhealthy” (> 55.5 μg/m3) or worse,” the report said. “Bangladesh: 80% of cities; Pakistan: 67% of cities; India: 32% of cities.”
The report said key drivers of air pollution in Pakistan included urbanization, rapid economic development, and industrialization. 
“Major sources of Pakistan’s air pollution include road transport emissions (both vehicle exhausts and road dust), domestic biomass burning, and industrial activity,” IQAir said. “Pakistan also experiences air pollution from agricultural burning and shares transboundary pollution from this activity with India.”
Alarmingly, the report noted that more than 20% of deaths in Pakistan were “attributable to the negative health impacts of air pollution exposure.” 
IQAir also ranked Lahore as the world’s 18th most polluted city during 2020 and second most polluted megacity, after New Delhi, exposing its over 11 million residents to hazardous PM2.5 levels. 
“There is no public access to data from the government network, but the Pakistan Environmental Protection Agency has implemented some measures to mitigate industrial emissions and plans to implement a monitoring network,” IQAir said. “It is not yet clear whether data from the monitoring network will be made public in real-time.”