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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.
Below is a list of 526 cities sorted by their annual mean concentration of PM2.5 (μg/m 3) in 2022. [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. Please note that constraints exist in this type of ...
Looking down from the Hollywood Hills, with Griffith Observatory on the hill in the foreground, air pollution is visible in downtown Los Angeles on a late afternoon.. Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems.
For the past few years, cities in northern India have been covered in a thick layer of winter smog. The situation has turned quite drastic in the national capital, Delhi . This smog is caused by the collection of particulate matter (a very fine type of dust and toxic gases) in the air due to stagnant movement of air during winters. [ 51 ]
Air pollution has been a problem in several countries in Asia, among them India.. India’s capital city, Delhi, which is home to some 33 million people, has long struggled with hazardous air.The ...
Air pollution levels in Bangkok have increased since 2019, following trends of increasing pollution in Northern Thailand. [4] Approximately 60% of the city's air pollution can be traced to transportation, with industrial emissions as the second largest contributor. [5] Agricultural emissions in nearby provinces is likewise a contributor. [6] [5]
Flights were diverted from Bangkok’s Don Mueang International Airport to Suvarnabhumi Airport on Sunday morning, as air pollution in the city reached hazardous levels. Poor visibility, which ...
Data and Methodology: How We Scored the Cities. Our ranking for the best and worst cities for getting outdoors started with the 50 most populous metropolitan statistical areas in the U.S.