The report states that only 7 countries and regions in the world meet the World Health Organization's air quality guideline value (5 micrograms/cubic meter)

News from this site on March 20, Swiss air quality organization IQAir recently released a report stating that it surveyed 134 countries and regions around the world and found that only 7 countries and regions reached the World Health Organization’s PM2.5 air quality standards. Quality Standard.

The report tracked 7,812 locations around the world and used observations from more than 30,000 air quality monitoring stations. The following are the main contents of the report:

A total of 124 countries and regions (92.5%) out of 134 countries and regions had PM2.5 exceeding the WHO 5 µg/m Annual guidance value of 3.
Africa has the worst air quality, with one-third of the population still lacking access to quality air.
Climate conditions and transboundary haze are major factors in Southeast Asia, with PM2.5 concentrations rising in almost every country.
Begusarai, India, was the most polluted urban area in 2023. India has four of the most polluted cities in the world.
The most polluted large city in the United States is Columbus, Ohio.
Las Vegas, Nevada is the largest city in the United States with the best air quality.
For the first time, Canada has become the most polluted country in North America, with 13 of the most polluted cities in the region located in Canada.
The top five most polluted countries in 2023 are

Bangladesh (79.9 micrograms/cubic meter) has more PM2 than the World Health Organization. 5 The annual guidance value is more than 15 times higher
Pakistan (73.7 micrograms/cubic meter) is more than 14 times higher than the World Health Organization PM2.5 annual guidance value
India (54.4 μg/m3) is more than 10 times higher than the World Health Organization’s annual PM2.5 guidance value
Tajikistan (49.0 μg/m3) More than 9 times higher than the World Health Organization's annual PM2.5 guidance value
Burkina Faso (46.6 micrograms/cubic meter) is higher than the World Health Organization's annual PM2.5 guidance value More than 9 times
China’s air quality in 2023 After the COVID-19 epidemic passed, various economic activities began to recover, and the

2023 IQAir World Air Quality Report

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