Air pollution, US cities

Report reveals 2024's most polluted cities, countries: Which US cities made the list?
Data from more than 40,000 air quality monitoring stations in 138 countries, territories and regions were analyzed for the report, IQAir said.
Most polluted cities in the world — and the U.S. — revealed in annual report
The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.
India has six of the world's 10 most polluted cities, report shows
Chad, in central Africa, is the world’s most polluted country, while California has the worst air pollution in North America, according to an IQAir report.
The list of the world’s top 20 most polluted cities is out. All but one are in Asia
The cities with the worst air pollution in North America were Ontario, Bloomington and Huntington Park – all in Southern California
20 most polluted cities in the world
Air pollution remains a serious global challenge, with some cities experiencing dangerously high levels of fine particulate matter (PM2.5). According to the latest IQAir report, 19 of the 20 most polluted cities in the world are in Asia,
India fifth most polluted country whereas Byrnihat in Meghalaya the world’s most polluted city: IQAir Report
India ranked as the fifth most polluted country in the world in 2024, with Byrnihat, Meghalaya, recognized as the most polluted metropolitan area globally. Despite a 7% decline in PM2.5 levels, New Delhi remained the most polluted capital.
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Particulate matter levels in air exceed WHO limits in majority of world's big cities
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Video: LIVE: IQAir leaders hold press conference on their report on global pollution
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