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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.
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.
These sections require the EPA "(1) to list widespread air pollutants that reasonably may be expected to endanger public health or welfare; (2) to issue air quality criteria for them that assess the latest available scientific information on nature and effects of ambient exposure to them; (3) to set primary NAAQS to protect human health with ...
The Central Pollution Control Board of India released the Air (Prevention and Control of Pollution) Act in 1981, amended in 1987, to address concerns about air pollution in India. [14] While the document does not differentiate between VOCs and other air pollutants, the CPCB monitors "oxides of nitrogen (NO x ), sulphur dioxide (SO 2 ), fine ...
More than 330 species of wildlife around the world are contaminated with PFAS or "forever chemicals," according to a new analysis chemical pollution in animals.
Another air filter modelled after trees, the BioUrban, was constructed in Puebla, Mexico in 2019. The company that created the BioUrban plans to expand to Turkey and Colombia. [6] [28] In Belgrade, Serbia, currently ranked 24th in the world for worst air quality, the Liquid3, also called a "liquid tree", was installed in 2019. The Liquid3 ...
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.
Air pollutants from these operations have caused acute physical symptoms, such as respiratory illnesses, wheezing, increased breath rate, and irritation of the eyes and nose. [ 65 ] [ 66 ] [ 67 ] That prolonged exposure to airborne animal particulate, such as swine dust, induces a large influx of inflammatory cells into the airways. [ 68 ]