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  2. Air pollution in the United States - Wikipedia

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

    After a steady 23-year decline in US pollution levels through 2017, the American Lung Association's State of the Air 2022 report found a sharp uptick in pollution over the past five years. [ 96 ] According to the American Lung Association's State of the Air 2024 report, California retains its position of being the state with the most metro ...

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

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

    The No. 1 state with the worst air quality of any state in the United States may not be what you would've guessed. ... 'Calmcations' are the most relaxing way to travel this year. Sports. Sports.

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

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

    Fresno has some of the worst air quality in the United States, according to the American Lung Association. The Central Valley is one of the top 10 most polluted cities in the United States ...

  5. 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 ...

  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. Air quality in Utah - Wikipedia

    en.wikipedia.org/wiki/Air_quality_in_Utah

    Air quality in Utah is often some of the worst in the United States. [ 1 ] [ 2 ] Poor air quality in Utah is due to the mountainous topography which can cause pollutants to build up near the surface (especially during inversions [ 2 ] ) combined with the prevalence of emissions from gasoline- and diesel-powered vehicles, especially older models.

  8. WA air quality ranked among best in the U.S. Which counties ...

    www.aol.com/wa-air-quality-ranked-among...

    Washington ranked in the top three. Air quality by state. ... The five states with the worst air quality, according to the study, are: ... In the one-year period used for the study, most ...

  9. Pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Pollution_in_the_United_States

    These monitors help ensure air quality standards are met and also provide important data for studying pollution trends. The information shows significant improvements in air quality over recent decades. From 1980 to 2019, levels of carbon monoxide, lead, and sulfur dioxide dropped by over 80%, and particulate matter also decreased substantially.