It is the most recent episode that thick fog covers Lahore , blocking out the winter sunshine, closing off the motorway after dusk and preventing flights from landing at the international airport at night. Residents of Lahore, are facing a dense blanket of smog that has reduced visibility for commuters and been responsible for several respiratory and mental illnesses. The problem has grown worse over the last five years due to the high levels of pollution and poor air quality in the city, created by increasing vehicular, industrial emissions, coal-based power plants, and burning of agriculture waste.To break it down, smog is a mixture of different pollutants, including oxides of nitrogen (NOx), oxides of Sulphur (SOx), carbon monoxide (CO), particulate matter (PM), volatile organic compounds (VOC), and the ozone. The main pollutant responsible for smog built up is NOx. Historically, the most lethal smog was the London’s Great Smog in 1952, when more than 12,000 deaths were repor...
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