What even didn’t happen during the lockdown period has happened when there is no such thing as lockdown in Delhi.
Central Pollution Control Board (CPCB) recorded the cleanest air in Delhi on Monday (August 31, 2020) scoring 41 on the air quality index, which is the cleanest ever since Air Quality Index was launched back in 2015.
This was also August’s fourth ‘good’ air day when AQI was at or below 50, and the fifth day this year.
Good Air Day is what days that score less than 50 on the air quality index. When AQI was launched in Delhi in 2015, it recorded no good air day. Similarly in 2016 too, there was no hint on good air days. It was only in 2017 that Delhi saw good air days on July 30 and 31, when AQI dropped to 43 and 47, respectively.
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In 2020, Delhi has experienced five good air days owing to rain. On August 13 and 20 the AQI was 50, but it fell to 45 on August 24. The wind speed along with rain has to be credited for the pleasant atmosphere in Delhi which is surely a rarity. Have a look:
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According to Anumita Roy Chowdhury, executive director (research and advocacy) at Centre for Science and Environment, a good monsoon is to be credited for such exotic captures.
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“After the unlocking process started, monsoon hit Delhi-NCR. This kept background emissions lower than normal. Winter data will also need to be assessed to arrive at a conclusion,” TOI quoted her as saying.