上海吃灰，北京吃土，南京吃……
地面臭氧 颗粒物(PM)，包括PM10以及极细微粒PM2.5 一氧化碳 二氧化硫 二氧化氮
AQI：0-50——空气质量良好。 AQI：51-100——空气质量为中等。 AQI超过100——不健康，尤其对敏感人群(有基础肺病的患者)不好。 AQI超过300——危险(Hazardous)
参考文献
1 Air Now: Air Quality Index (AqI) Basics. 2019. Available at: https://airnow.gov/index.cfm?action=aqibasics.aqi (Accessed on January 02, 2023).
2 Ambient (outdoor) air pollution. Available at: www.who.int/news-room/fact-sheets/detail/ambient-(outdoor)-air-quality-and-health (Accessed on January 02, 2023).
3 Dockery DW, Pope CA 3rd, Xu X, et al. An association between air pollution and mortality in six U.S. cities. N Engl J Med 1993; 329:1753.
4 Laden F, Schwartz J, Speizer FE, Dockery DW. Reduction in fine particulate air pollution and mortality: Extended follow-up of the Harvard Six Cities study. Am J Respir Crit Care Med 2006; 173:667.
5 Rees N. Danger in the Air: How air pollution may be affecting the brain development of young children around the world. New York: United Nations Children's Fund (UNICEF); 2017. Available at: https://www.unicef.org/environment/files/Danger_in_the_Air.pdf (Accessed on September 16, 2019).
6 American Academy of Pediatrics Council on Environmental Health. Air Pollutants, Outdoor. In: Pediatric Environmental Health, 4th ed, Etzel RA, Balk SJ (Eds), American Academy of Pediatrics, Itasca, IL 2019. p.379.
7 Gehring U, Wijga AH, Hoek G, et al. Exposure to air pollution and development of asthma and rhinoconjunctivitis throughout childhood and adolescence: a population-based birth cohort study. Lancet Respir Med 2015; 3:933.
8 Rees N. United Nations Children's Fund (UNICEF). Clear the air for children. UNICEF, New York 2016. Available at: https://www.unicef.org/publications/index_92957.html (Accessed on October 20, 2020).
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