Kolkata's air quality improved by around 80-90 per cent after Cyclone Jawad-induced rain lashed the city in the last couple of days, pollution control board officials and environmentalists said on Tuesday.
The Air Quality Index (AQI) of 20 (good) was registered at Victoria Memorial, 43 (good) at Ballygunge, 33 (good) at Rabindra Sarobar, and 51 (satisfactory) at Rabindra Bharati University at 7 AM on Tuesday, as per data provided by the Central Pollution Control Board.
It was 185 (moderate) at Victoria Memorial, 212 (poor) at Ballygunge, 163 (moderate) at Rabindra Sarobar, and 307 (very poor) at Rabindra Bharati University at 9 AM on December 3 before the rain kicked in, it said.
"A maximum of 90 per cent and a minimum of 80 per cent improvement in the AQI of Kolkata was reported after the cyclone-induced rain lashed the city. This was a record low for the city in the month of December in the last 40 years," Environmentalist S M Ghosh told PTI.
West Bengal Pollution Control Board (WBPCB) Chairman Kalyan Rudra said that the improvement in AQI was very encouraging and air pollution was certainly one of the lowest, and the unseasonal rain definitely played a part in it.
He, however, said there was no mechanism to monitor real-time air quality four decades ago.
The average PM 2.5 level was at 19 mg per cubic meter, which is one of the lowest in the air pollution history of the eastern metropolis, the WBPCB said.
Even Howrah's Ghusuri, which normally records heavy air pollution due to the presence of several foundries where junk metals are processed, the AQI was 40 (good).
The AQI at Victoria Memorial monitoring station on December 6 last year was 254, and 175 in 2019.
Study attributed 72-92% of mercury emissions to human activities, primarily from fossil fuel combustion, industrial activities & vehicular emissions.
He mentioned that immunity is influenced by various factors beyond diet, including proper sleep.
A typical 10-20 minute hair styling routine using common hair care products and heated tools can release alarming levels of nanoparticle air pollution, comparable to standing by a busy highway, a new Purdue University study reveals.
Mumbai's pav is traditionally baked in wood-fired ovens. However, due to their contribution to air pollution in the city, bakeries have been directed to adopt greener alternatives.
At a review meeting on Monday, Environment Minister Manjinder Singh Sirsa went over the city's revised State Action Plan on Climate Change, setting targets for 2050 across nine key sectors
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