The largest share of Russian population resided in cities with a low index of atmospheric pollution (API) under five points. Russians living in areas that were categorized as highly and very highly exposed to air pollution, or those with an API of over seven points, occupied nearly 10 percent of the country's urban population.
Distribution of urban population in Russia in 2020, by atmospheric pollution index (API)*
* The atmospheric pollution index (API), used in Central Asian countries, was introduced in the USSR in 1991. It calculates "for the five substances found in the highest concentrations in relation to their degree of hazardousness. Air pollution is deemed to be very high, if the aggregate API exceeds 14; high, if 14 > API >7; relatively high, if 7 > API > 5; low, if API is < 5."
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Ministry of Natural Resources and Environment of the Russian Federation. (December 13, 2021). Distribution of urban population in Russia in 2020, by atmospheric pollution index (API)* [Graph]. In Statista. Retrieved February 16, 2025, from https://www.statista.com/statistics/1049346/russia-share-of-population-in-cities-by-air-pollution-level/?__sso_cookie_checker=failed
Ministry of Natural Resources and Environment of the Russian Federation. "Distribution of urban population in Russia in 2020, by atmospheric pollution index (API)*." Chart. December 13, 2021. Statista. Accessed February 16, 2025. https://www.statista.com/statistics/1049346/russia-share-of-population-in-cities-by-air-pollution-level/?__sso_cookie_checker=failed
Ministry of Natural Resources and Environment of the Russian Federation. (2021). Distribution of urban population in Russia in 2020, by atmospheric pollution index (API)*. Statista. Statista Inc.. Accessed: February 16, 2025. https://www.statista.com/statistics/1049346/russia-share-of-population-in-cities-by-air-pollution-level/?__sso_cookie_checker=failed
Ministry of Natural Resources and Environment of the Russian Federation. "Distribution of Urban Population in Russia in 2020, by Atmospheric Pollution Index (Api)*." Statista, Statista Inc., 13 Dec 2021, https://www.statista.com/statistics/1049346/russia-share-of-population-in-cities-by-air-pollution-level/?__sso_cookie_checker=failed
Ministry of Natural Resources and Environment of the Russian Federation, Distribution of urban population in Russia in 2020, by atmospheric pollution index (API)* Statista, https://www.statista.com/statistics/1049346/russia-share-of-population-in-cities-by-air-pollution-level/?__sso_cookie_checker=failed (last visited February 16, 2025)
Distribution of urban population in Russia in 2020, by atmospheric pollution index (API)* [Graph], Ministry of Natural Resources and Environment of the Russian Federation, December 13, 2021. [Online]. Available: https://www.statista.com/statistics/1049346/russia-share-of-population-in-cities-by-air-pollution-level/?__sso_cookie_checker=failed