Find out the most polluted cities in the world in 2023. Check out which city in the world had the highest level of air pollution PM2.5. Download the IQAir AirVisual world air quality report.
Find out the most polluted cities in the world in 2023. Check out which city in the world had the highest level of air pollution PM2.5. Download the IQAir AirVisual world air quality report.
Delhi is not the world’s most polluted city anymore, the World Health Organisation’s urban air quality database shows. Ten upcoming Indian cities and towns have landed in the top twenty most polluted places. Half of the world’s 20 most polluted cities are...
Delhi, India is a mega-city home to over 29 million people and is the second largest city on Earth. In 2023, the city’s average annual PM2.5 concentration was 102.1 µg/m3, a significant increase from the 2022 average of 93 µg/m³. Delhi was the fourth most polluted large cit...
The recently released IQAir AirVisual 2020 World Air Quality Report found that 15 of the world's 20 worst-polluted cities are in India, though the worst affected city on the planet is actually in China. The Western Chinese city of Hotan had an average PM 2.5 pollution level of 110.2 in...
In response to growing pollution from vehicle emissions, Lucknow built a metro rail service. This photo shows the fanfare of the train's inaugural run. 6. Delhi, India Sajjad Hussain/AFP/Getty Images The Indian capital was once the most polluted city in the world. The city still struggles ...
India has the world’s worst air pollution. Home to 21 of the world’s 30 most polluted cities, its poisonous air kills more than one million people each year. That’s partly because the South Asian nation is the world’s second largest brick producer. Brick kilns(砖窑)— which account ...
In this graphic, we map the world’s most polluted countries according toIQAir, ranked by their annual average PM2.5 concentration (μg/m³) in 2023. The unit μg/m³ refers to micrograms per cubic meter. What is PM2.5? PM2.5 refers to fine particulate matter, with a diameter of ...
To address these critical questions, we focus on the top 20 most polluted countries in the world—the nations that surpass the threshold level of PM2.5(0–5μg/m3) recommended by the WHO. The selection of the geographical context is underpinned by two compelling rationales: First, the selecte...