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Map of PM2.5 pollution over China from April to August 2014. Air pollution is a major public health issue in China. Over the past three decades, the rapid development of China has resulted in excessive emissions of greenhouse gases. Among the 337 cities, more than 40 percent of the major air pollutant concentrations exceeded Chinese standards. [29]
Air pollution is among the biggest health problems of modern industrial society and is responsible for more than 10 percent of all deaths worldwide (nearly 4.5 million premature deaths in 2019), according to The Lancet. Air pollution can affect nearly every organ and system of the body, negatively affecting nature and humans alike.
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.
The centre reported the average PM2.5 levels throughout the city on Tuesday at 44.9 micrograms per cubic metre (µg/m³), well above the country’s standard of 37.5 µg/m³ over a three-hour ...
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.
In Oct 2014, the air quality index in Beijing reached a peak of 470, far beyond the severe pollution level of 300; meanwhile, the situation was even more serious in the neighboring province of Hebei, whose PM2.5 particles climbed above 500 micrograms per cubic meter—northern China was blanketed by the heavy air pollution, forcing the Chinese ...
PM 2.5 is a byproduct of the process of coal burning from power stations and produces significant amounts of sulfate, black carbon, ammonium, and nitrate. In 1989, 32.7% of PM 2.5 particulates in Beijing came from burning of coal, which decreased to 16.4% in 2000, as people started to use cleaner energy such as natural gas.
“Because coal is the primary fuel used to power China’s industrial sector, it is responsible for about 40 percent of the deadly fine particulate matter found in China’s atmosphere.” [39] In January 2013, fine airborne particulates that pose the largest health risks, rose as high as 993 micrograms per cubic meter in Beijing, compared ...