Most polluted cities in the world – and the US – revealed in an annual report


In Los -egeles were The lowest air quality In the US in 2024, according to the annual Report on the quality of the air in the world from IQair.

Annual report is considered more than 40,000 data Air Monitoring Stations According to IQair, in Switzerland, in Switzerland, based in Switzerland, Switzerland, based in Switzerland.

The rating is based on the average annual concentrated microgram of pollutants per cubic meter. The World Health Organization recommends 5 micrograms of pollutants per cubic meter.

Which countries are the lowest air quality?

The world with the worst air quality was Chad, Bangladesh, Pakistan, the Democratic Republic of the Congo and India. Ikair said Chad had 91.5 mcg pollutants per cubic meter That recommends who recommend. Bangladesh was 78 years old, there were 73.7 in Pakistan, the Democratic Republic of the Congo had 58.2, and in India it was 50.6 mcg per cubic meter.

Air pollution in daca
On November 12, 2024, people move along a dusty, busy road to Daka, Bangladesh.

Syed Mahamudur Rahman/Nurphoto via Getty Images


But Bernihat, India, was the most contaminated metropolitan area in 2024, the IQair said. The city had an average annual concentration of 128.2 mcg per cubic meter. India has lived six of the nine most polluted world cities, Ikair said.

One hundred and twenty -six countries, or 91.3% of the world, have exceeded WHO guidelines, the report said.

Earth conditions in different countries can affect the amount of pollutants per cubic meter, Ikair said. The fires in the Amazon caused a level in the Brazilian districts almost four times. The entire African continent has only one moniotring station for every 3.7 million people, said Ikair, which could lead to inaccurate data for the region.

What parts of the US have the best and worst air quality?

According to IQair, in most US cities there were 5.1 to 15 micrograms of contamination per cubic meter. A number of cities, especially along the west coast, New England and in the southwest, had from 0 to 5 micrograms of contamination per cubic meter, meeting with guidelines.

The head of the city with the worst air pollution was Los -Angeles, California. The smaller municipality of Ontario, California, had the most pollution of any city, the report said.

A ferry terminal in Seattle shows Seattle Ferry and Seattle Sauizod on Sunset, Washington, Washington, Washington
Seattle's ferry terminal shows Seattle ferry and Seattle Skylin on Sunset, Washington.

Joe Som/Visions of America/Universal Images Group via Getty Images


Seattle, Washington, was the purest major city in the US, IQair reports.

What parts of the world have the best air quality?

Australia, Bahamas, Barbadas, Estonia, Grenada, Iceland and New Zealand fulfilled the guidelines for the air quality. The purest metropolis in the world was Maaguez, Puerto -Rica, with an average annual concentration of 1.1 mcg per cubic meter.

The purest region is the oceanic, which includes Australia, New Zealand, Papua -Nova Guinea and hundreds of smaller islands. Fifty -seven percent of the cities of the region fulfilled the WHO guidelines, the IQair reported.

Seventeen percent of the cities in the report have fulfilled the annual guidelines, Ikair said. It Increase from 2023If only 9% of cities fulfilled the guidelines.

“Although this notes some progress, there is still a lot of work to protect human health, especially children,” Ikair said in the report.


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Why is the air quality so important?

The air pollution is' ​​a critical threat to both human health and environmental stability, CEO of IQair Frank Hames said in the news release announcing the conclusions of the report.

According to who. Air pollution is the second leading global risk factor. In 2021 one can core 8.1 million deaths worldwide The air pollutionIkair said.

Ikair said the impact of concentrated micrograms of pollutants caused about 58% of these deaths. Exposure to micrograms of pollutants can promote and enhance health, including asthma, cancer, stroke and lung disease. Children may face respiratory and development problems.



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