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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 ...
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 ...
Ship with tourists, Victoria Harbour, Hong Kong, 2024. Pollutants from marine vessels are main sources of air pollution in Hong Kong. As per the Clean Air Network, 53% of Hong Kong's pollution comes from local sources – power stations, idling engines of cars, trucks and buses and marine emissions as of 2012.
[1] [2] By default the least polluted cities which have fewest particulates in the air come first. Click on the arrows next to the table's headers to have the most polluted cities ranked first. Click on the arrows next to the table's headers to have the most polluted cities ranked first.
In Kathmandu, ambient air pollution due to construction projects, the high population which results in an increased number of vehicles, and bad conditions of the road lead to hazardous pollution. [3] In Nepal, Diarrhea is the 4th leading cause of death. There is still limited systemic monitoring of the water system and water quality. [4]
Air pollution is a major issue in the Kathmandu Valley. [ 46 ] [ 47 ] [ 48 ] According to the 2016 World Health Organization's Ambient Air Pollution Database, [ 49 ] the annual average PM2.5 (particulate matter) concentration in 2013 was 49 μg/m 3 , which is 4.9 times higher than recommended by the World Health Organization .
In Hong Kong, there were two types of API: General API and Roadside API. The EPD reported the latest APIs hourly. The index and the air quality objectives were set in 1987; and pollutant levels are measured over varying periods, in μg/m 3. There are hourly, 24-hour and annual targets for sulfur dioxide and nitrogen dioxide, and 24-hour and ...
Air pollution can occur naturally or be caused by human activities. [4] Air pollution causes around 7 or 8 million deaths each year. [5] [6] It is a significant risk factor for a number of pollution-related diseases, including heart disease, stroke, chronic obstructive pulmonary disease (COPD), asthma and lung cancer.