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This list contains the top 500 cities by PM2.5 annual mean concentration measurement as documented by the World Health Organization covering the period from 2010 to 2022. The January 2024 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 5,390 towns and cities in 63 countries.
Air pollution can affect nearly every organ and system of the body, negatively affecting nature and humans alike. Air pollution is a particularly big problem in emerging and developing countries, where global environmental standards often cannot be met. The data in this list refers only to outdoor air quality and not indoor air quality, which ...
Air quality index; A. Air Pollution Index; Air Quality Health Index (Canada) I. ... This page was last edited on 17 January 2022, at 13:19 (UTC).
The most commonly used air quality index in the UK is the Daily Air Quality Index recommended by the Committee on the Medical Effects of Air Pollutants (COMEAP). [39] This index has ten points, which are further grouped into four bands: low, moderate, high and very high. Each of the bands comes with advice for at-risk groups and the general ...
An air quality improvement plan in 2017 appears to be showing positive results. Out of the 480 cities, Dammam in Saudi Arabia is performing the worst with PM 2.5 levels going up +111.1 μg/m 3 . The city is a significant center for the Saudi oil industry and home to both the largest airport in the world and the largest port in the Persian Gulf.
City Quality of Life Indices are lists of cities that are ranked according to a defined measure of living conditions.In addition to considering the provision of clean water, clean air, adequate food and shelter, many indexes also measure more subjective elements including a city's capacity to generate a sense of community and offer hospitable settings for all, especially young people, to ...
Some air pollution laws include specific air quality standards, such as the U.S. National Ambient Air Quality Standards and E.U. Air Quality Directive, [260] which specify maximum atmospheric concentrations for specific pollutants. Environmental agencies enact regulations which are intended to result in attainment of these target levels.
Urban air quality index (AQI) values are computed by combining or comparing the concentrations of a "basket" of common air pollutants (typically ozone, carbon monoxide, sulfur dioxide, nitrogen oxides, and both fine and coarse particulates) to produce a single number on an easy-to-understand (and often colour-coded) scale.