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  2. Chicago air quality unhealthy as Canadian wildfire emissions ...

    www.aol.com/chicago-air-quality-unhealthy...

    The smoke has degraded the air quality in North America and reached Europe during June’s second week. The fires started in Canada’s West in May before moving east and leading to about 160 ...

  3. Chicago's air quality ranks among worst in the world - AOL

    www.aol.com/news/chicagos-air-quality-ranks...

    Canadian wildfires are once again taking a toll on the continental U.S., this time in the Midwest, where air quality alerts have been issued across the region. Chicago's air quality ranks among ...

  4. 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 ...

  5. List of least-polluted cities by particulate matter concentration

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

    [1] [2] By default the least polluted cities which have fewest particulates in the air come first. Click on the arrows next to the table's headers to have the most polluted cities ranked first. Click on the arrows next to the table's headers to have the most polluted cities ranked first.

  6. Pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Pollution_in_the_United_States

    Air pollution is caused predominantly by burning fossil fuels, cars, and much more. [4] Natural sources of air pollution include forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds, and natural radioactivity. These natural sources of pollution often soon disperse and thin settling near their locale.

  7. Chicago stargazers find more light pollution and wildfires ...

    www.aol.com/weather/chicago-stargazers-more...

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  8. Air pollution - Wikipedia

    en.wikipedia.org/wiki/Air_pollution

    Air pollution can occur naturally or be caused by human activities. [4] Air pollution causes around 7 or 8 million deaths each year. [5] [6] It is a significant risk factor for a number of pollution-related diseases, including heart disease, stroke, chronic obstructive pulmonary disease (COPD), asthma and lung cancer.

  9. Chicago - Wikipedia

    en.wikipedia.org/wiki/Chicago

    Chicago [a] is the most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 census, ...