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  2. The states with the dirtiest air will surprise you - AOL

    www.aol.com/news/states-dirtiest-air-surprise...

    The Golden State has the worst air quality of any state in the US, according to a new report from the United Health Foundation. The report measured air quality by the average person's exposure ...

  3. Fresno is among top 10 most polluted cities in U.S., American ...

    www.aol.com/fresno-among-top-10-most-120000248.html

    The American Lung Association’s State of the Air report for 2024 ranked U.S. cities and graded counties based on ozone and particle pollution during 2020, 2021 and 2022, according to its website.

  4. The Dirtiest (and Cleanest) Big Cities in America - AOL

    www.aol.com/dirtiest-cleanest-big-cities-america...

    Air pollution has been a consistent and ongoing nuisance in Phoenix — along with five other cities in Arizona, it’s tied for the worst air quality in the nation. According to research group ...

  5. Air pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_in_the...

    Looking down from the Hollywood Hills, with Griffith Observatory on the hill in the foreground, air pollution is visible in downtown Los Angeles on a late afternoon.. Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems.

  6. List of most-polluted cities by particulate matter concentration

    en.wikipedia.org/wiki/List_of_most-polluted...

    The January 2024 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 5,390 towns and cities in 63 countries. Air quality in the database is represented by the annual mean concentration of particulate matter (PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometers, respectively). [1 ...

  7. These Iowa metros have the cleanest air in U.S., says new ...

    www.aol.com/iowa-metros-cleanest-air-u-101904792...

    Search a location by zip code, city or state to learn more about the current air quality and forecasts on airnow.gov. AirNow is a partnership of the U.S. Environmental Protection Agency, National ...

  8. Sacramento got an F in air quality on American Lung ... - AOL

    www.aol.com/sacramento-got-f-air-quality...

    The American Lung Association’s State of the Air report for 2024 ranked U.S. cities and graded counties based on ozone and particle pollution during 2020, 2021 and 2022, according to its website.

  9. Milwaukee has some of the worst air quality in the nation, a ...

    www.aol.com/milwaukee-worst-air-quality-nation...

    Rankings were based on the area's worst county's average number of unhealthy air quality days. In the Milwaukee metro area, Racine County had an average of 6.7 unhealthy air quality days per year ...