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Delhi's air quality improves on the back of winds

Officials at the India Meteorological Department said winds gusting up to 20 kmph on Sunday and 25 kmph on Monday led to a marked improvement in the air quality and improved visibility.

November 23, 2021 / 10:06 AM IST
India's capital New Delhi  ranks first with 1,826.6 cameras per square mile. CM Arvind Kejriwal tweeted that

India's capital New Delhi ranks first with 1,826.6 cameras per square mile. CM Arvind Kejriwal tweeted that "Feel proud to say that Delhi beats cities like Shanghai, NY n London with most CCTV cameras per sq mile, Delhi has 1826 cameras, London has 1138 cameras per sq mile, My compliments to our officers and engineers who worked in mission mode n achieved it in such a short time".

Delhi’s air quality improved from "very poor" to "poor" and the air quality index (AQI) read 276 at 9 am on Tuesday with favourable wind speed, up to 25 kmph, aiding dispersion of pollutants over the two last days.

Officials at the India Meteorological Department said winds gusting up to 20 kmph on Sunday and 25 kmph on Monday led to a marked improvement in the air quality and improved visibility.

The reason why Delhi’s air quality on Sunday (349) and Monday (311) was recorded in the "very poor" category is that the AQI reading at any given time is an average of AQIs recorded in the previous 24 hours.

Neighbouring Faridabad (270), Ghaziabad (232), Greater Noida (212), Gurugram (273) and Noida (232) also saw a marked improvement in the air quality.

An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".

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The Ministry of Earth Sciences’ air quality monitor SAFAR said local and transport-level winds are likely to slow down from Wednesday and result in slight deterioration in the air quality.

The Delhi government on Monday lifted the ban on construction and demolition activities in view of an improvement in the air quality and the inconvenience caused to workers.

The government will take a call on the reopening of schools, colleges and other educational institutions and work-from-home for its employees during a review meeting on Wednesday.

"We will also discuss if CNG-operated trucks carrying non-essential items can be allowed to enter Delhi if the situation continues to improve," Environment Minister Gopal Rai said.

The city government had on Sunday night extended work-from-home for its employees and the ban on the entry of trucks carrying non-essential items till November 26 to combat air pollution and minimise its health effects.
PTI
first published: Nov 23, 2021 10:09 am

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