According to a West Bengal Pollution Control Board official, Kolkata’s air quality has dramatically improved due to a reduction in the number of vehicles on the roads due to restrictions placed two days ago to prevent the spread of coronavirus.
As the number of cars has decreased and commercial activities have decreased dramatically, there is much less sulphur, nitrogen, and carbon particulates in the air, resulting in less air pollution, he said.
S M Ghosh, an environmentalist, believes this is beneficial for both Covid-19 patients and those with respiratory issues. The city’s air quality index (AQI) ranged from 39 to 63 pm. At 6 p.m., 2.5 in all but one of the city’s air stations, according to the official. Only at Rabindra Bharati University’s air monitoring station near the B T Road arterial was the air quality index 95, which was well within the acceptable range of 100 or satisfactory level (51 to 100 AQI), he said. At Ballygunje AQI level was 63, at Bidhannagar 51, at Fort William 60 and at Rabindra Sarobar 56. At Jadavpur, it was 39, marked as good.
Just 30 micrograms per cubic metre (pm 2.5 or 2,5 micron size) was registered in the open in the past two days, according to Ghosh, while the amount of respirable particulate matter in a room on the side of a main road is only 8 mg/cubic metre.