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  2. As wildfire smoke chokes LA, see how many-bad air days your ...

    www.aol.com/wildfire-smoke-chokes-la-see...

    Air pollution has dropped significantly in the U.S. since the 1970s. However, wildfires have emerged as a growing threat – making it harder to clean up the air and protect people’s health.

  3. Los Angeles air quality improves from wildfires ... - AOL

    www.aol.com/news/los-angeles-air-quality...

    Air quality in Los Angeles was at "moderate" levels on Thursday morning, as judged by the EPA's Air Qualit ... and some segments of the general population. Early that day, hourly pollution levels ...

  4. Risks from ash and air pollution remain for people returning ...

    www.aol.com/risks-ash-air-pollution-remain...

    The American Lung Association’s State of the Air report for 2024 listed the Los Angeles area as one of the top 10 cities polluted by year-round particle pollution. It’s been No. 1 for ozone ...

  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. 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. 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.

  8. In Los Angeles, people snap up air filters and wear masks ...

    www.aol.com/los-angeles-people-snap-air...

    Small particles are some of the most health-damaging air pollution, linked to a range of chronic and deadly health issues, according to the U.S. Environmental Protection Agency.

  9. 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 ...