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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 quality in the database is represented by the annual mean concentration of particulate matter (PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometers, respectively). [1 ...
The reports provide guidelines intending to give guidelines to reduce the health effects of air pollution. [2] The guidelines stipulate that PM 2.5 should not exceed 5 μg/m 3 annual mean, or 15 μg/m 3 24-hour mean; and that PM 10 should not exceed 15 μg/m 3 annual mean, or 45 μg/m 3 24-hour mean. [2]
In European countries, air quality at or above 10 micrograms per cubic meter of air (μg/m 3) for PM 2.5 increases the all-causes daily mortality rate by 0.2-0.6% and the cardiopulmonary mortality rate by 6-13%. [35] Worldwide, PM 10 concentrations of 70 μg/m 3 and PM 2.5 concentrations of 35 μg/m 3 have been shown to increase long-term ...
On December 30, 2013, Hong Kong replaced the Air Pollution Index with a new index called the Air Quality Health Index. [17] This index, reported by the Environmental Protection Department, is measured on a scale of 1 to 10+ and considers four air pollutants: ozone; nitrogen dioxide; sulfur dioxide and particulate matter (including PM10 and PM2 ...
Criticising the National Clean Air Programme, Khosla points out that it focuses on reducing pollution caused by larger PM10 particles instead of the more harmful PM2.5.
Our air quality meter recorded the Gen1 transformed a small room’s air quality from 204 micrograms per cubic meter of PM2.5 to 23 in around 40 minutes. That’s almost twice as long as air ...
“Wildfire smoke events in 2023 resulted in the DNR issuing 15 PM2.5 air quality advisories – almost five times higher than the average over the previous 12 years,” the report added.
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 caused an additional two million premature deaths in 2019.
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