In the filthy air quality cities of the world, two of Pakistan’s populated cities have been recruited. On Saturday, Lahore ranked fourth and Karachi ranked 10th on the Global Air Quality Index (AQI), among the most polluted cities in the world, according to reports.
In Pakistan’s cities, Bahawalpur was measured to possess 327 hazardous particulate , while the reading of Lahore was 194, Rawalpindi 189, Raiwind 170, Karachi 167, and Multan 165, consistent with the air quality index.
It is pertinent to be stated here that AQI as high as 151-200 is taken into account unhealthy, while an AQI reading between 201 to 300 is more harmful and AQI over 300 mark is dubbed extremely hazardous.
As suggested by the experts, the air becomes heavier within the winter as compared to summer, causing poisonous particles within the atmosphere to maneuver downwards and making the atmosphere polluted. As a result, a layer of polluted particles, including large amounts of carbon and smoke, covers the town .
The smoke produced by factories and by burning coal, garbage, oil or tyres enters the atmosphere and therefore the effects of this appear at the onset of winter and remain till the season’s end, experts said.
Thus, pollution reaches extremely dangerous levels in weather , severely compromising air quality.
Although southwestern winds blowing from the ocean in Karachi may go as a filter for the air, these winds remain mostly suspended during winter, consistent with experts.
Moreover, they noted that winds blowing from the northeast increase the concentration of hidden polluted particles, and a healthy atmosphere in such a situation is subject to rainfall, which washes off all polluted particles.
The AQI is evaluated on the idea of 5 scientific categories of pollution including traces of ground-level ozone, particulate , carbon monoxide gas , sulphur dioxide , and dioxide .
