Air quality in Chennai worsens since 2019 The amount of particulate matter in the air of Chennai has risen in 2022 than 2019. Then, it was the second most polluted city in India, with respect to PM 2.5 levels, according to CPCB. In terms of PM 10 levels, Chennai has ranked higher and become the third least polluted city in Chennai. In 2019, the PM10 level was 55 units and last year, the amount was 65 units. The National Clean Air Programme (NCAP) tracker report said that cities that had cleaner air in 2019 deteriorated over the years. Experts say…
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