air quality report 2023

• New Delhi has been ranked the world's most polluted capital for the fourth consecutive year since 2018.

• According to the Air Quality Report 2023, Delhi's PM2.5 levels increased from 89.1 micrograms per cubic meter in 2022 to 92.7 micrograms per cubic meter in 2023.

• Begusarai, in Bihar, is now the most polluted metropolitan area in the world.

• Its average PM2.5 concentration was 118.9 micrograms per cubic metre. It did not find a place in the ranking for 2022.

• India's air quality was the third worst in the world after Bangladesh and Pakistan.

• India's average annual PM2.5 concentration was 54.4 micrograms per cubic metre.

• According to the report, for more than a billion people, PM2.5 concentrations in India exceed the World Health Organization's annual guideline limit of 5 micrograms per cubic metre.