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Delhi air improved in 2022, was 2nd cleanest in 6 years

The annual average PM2.5 concentration of Delhi in 2022 fell below 100 micrograms per cubic metre for only the second time since 2017, making the year gone by the second cleanest in the last six years. However, the 2022 average was still 2.5 times higher than the annual national ambient air quality standard of 40 micrograms/cubic metre and 20 times higher than WHO’s safe limit of 5.

from Times of India https://ift.tt/dK45cCL
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