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Combining ground-based air quality data with satellites and models to produce air quality estimates for cities around the world, authors noted that in 2019, 1.7 million deaths linked to PM2.5 exposure occurred in the 7,239 cities with cities in Asia, Africa, and eastern and central Europe seeing the greatest health impacts.Īmong the most populous cities in each region, Delhi and Kolkata featured in the top 10 with the highest PM2.5-related disease burden in 2019. In fact, the world’s biggest cities and urban areas face some of the worst air quality on the planet, states ‘Air Quality and Health in Cities’ using data from 2010 to 2019 and focusing on two of the most harmful pollutants-fine particulate matter (PM2.5) and nitrogen dioxide (NO2). Delhi and Kolkata reported 106 and 99 deaths per 1 lakh population in 2019, which could be attributed to PM2.5 pollution, according to a new report published by US-based Health Effects Institute on Wednesday.ĭelhi had the highest average level of fine PM2.5 among the world’s most-populated cities, followed by Kolkata, according to the report that analysed air pollution and global health effects in over 7,000 cities.