New Delhi: An analysis done by System of Air Quality and Weather Forecasting And Research (SAFAR), the forecasting body under Union ministry of earth sciences, shows this year Delhi saw 179 days when PM2.5 concentration was within the national ambient air quality standard of 60 micrograms per cubic metre.
In contrast, the standard was met for just 137 and 121 days in 2019 and 2018, respectively. The highest number of “good-air” days (193) was recorded in 2020 as the pollution levels reduced drastically due to the lockdown.
Till December 30 this year, the air quality was above the standard for 51% of the days. However, PM2.5 concentration spiked to four times the national standard on nearly 12 days.
Denne historien er fra December 31, 2021-utgaven av The Times of India Delhi.
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