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  2. 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.

  3. Nearly 40% of people in the US live with unhealthy air ... - AOL

    www.aol.com/nearly-40-people-us-live-040127074.html

    The number of people living with levels of air pollution that can significantly affect their health climbed from about 119 million in last year’s data to 131 million in the current data ...

  4. That means the air quality is dangerous for children, older people and those with respiratory conditions. DAQ must issue a Code Red when the 24-hour average is at least 55.5 nanograms per cubic meter.

  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 - Wikipedia

    en.wikipedia.org/wiki/Pollution

    Various definitions of pollution exist, which may or may not recognize certain types, such as noise pollution or greenhouse gases.The United States Environmental Protection Administration defines pollution as "Any substances in water, soil, or air that degrade the natural quality of the environment, offend the senses of sight, taste, or smell, or cause a health hazard.

  7. What it means for the Supreme Court to block enforcement of ...

    www.aol.com/news/means-supreme-court-block...

    The justices have restricted EPA’s authority to fight air and water pollution, including a landmark 2022 ruling that limited EPA’s authority to regulate carbon dioxide emissions from power ...

  8. Particulate pollution - Wikipedia

    en.wikipedia.org/wiki/Particulate_pollution

    Particulate pollution is pollution of an environment that consists of particles suspended in some medium. There are three primary forms: atmospheric particulate matter, [1] marine debris, [2] and space debris. [3] Some particles are released directly from a specific source, while others form in chemical reactions in the atmosphere.

  9. Smog - Wikipedia

    en.wikipedia.org/wiki/Smog

    Smog, or smoke fog, is a type of intense air pollution.The word "smog" was coined in the early 20th century, and is a portmanteau of the words smoke and fog [1] to refer to smoky fog due to its opacity, and odour. [2]