Air quality guideline
Air quality guideline is an annual mean concentration guideline for particulate matter from the World Health Organization. The guideline stipulates that PM2.5 not exceed 10 μg/m3 annual mean, or 25 μg/m3 24-hour mean; and that PM10 not exceed 20 μg/m3 annual mean, or 50 μg/m3 24-hour mean.
In terms of health effects, the guideline states that PM2.5 concentration of 10 is the lowest level at which total, cardiopulmonary and lung cancer mortality have been shown to increase with more than 95% confidence in response to long-term exposure to PM2.5.
Along with cardiopulmonary and lung cancer deaths, the chances of which an individual increases their risk of being diagnosed with these is highly coordinated to fine particulate matter and sulfur oxide- related pollution. "Each 10 μg/m³ m^3 elevation in fine particulate air pollution was associated with approximately a 4%, 6% and 8% increased risk of all-cause, cardiopulmonary, and lung cancer mortality, respectively." 
- World Health Organization (September 2016), Ambient (outdoor) air quality and health: fact sheet, archived from the original on 2016-01-04 Cite uses deprecated parameter
- Pope, C. Arden; Burnett, Richard T.; Thun, Michael J. (March 6, 2002). "Lung Cancer, Cardiopulmonary Mortality, and Long-term Exposure to Fine Particulate Air Pollution". Retrieved 4 May 2017. Cite journal requires
- WHO - WHO Air quality guidelines for particulate matter, ozone, nitrogen dioxide and sulfur dioxide - Page 11
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