IQAir’s 2021 World Air Quality Report is the first major global air quality report based on the updated annual WHO air quality guideline for PM2.5. The new guideline was released in September 2021 and cut the existing annual PM2.5 guideline value from 10 µg/m3 to 5 µg/m3.
Fine particle pollution, known as PM2.5, is commonly accepted to be the most harmful, widely-monitored air pollutant and has been found to be a major contributing factor to health effects such as asthma, stroke, heart and lung diseases. PM2.5 leads to millions of premature deaths every year.
The top five most polluted countries in 2021 were:
“It is a shocking fact that no major city or country is providing safe and healthy air to their citizens according to the latest World Health Organization air quality guideline,” said Frank Hammes, CEO of IQAir. “This report underscores just how much work remains to be done to ensure that everyone has safe, clean and healthy air to breathe. The time for action is now.”
Click to download the report – https://www.iqair.com/in-en/world-air-quality-report
About the World Air Quality Report
The 2021 World Air Quality Report is based on PM2.5 air pollution data from ground-based air quality monitoring stations in 6,475 cities in 117 countries, regions and territories. Of the air quality monitoring stations included in this report, 44 percent were operated by governmental agencies, while the remainder represent monitoring stations managed by citizen scientists, non-profit organizations and companies.