Various scientific studies demonstrate that atmospheric pollutants are extremely harmful to humans and ecosystems. Air pollution causes impacts both on the environment and on health, and can even cause death.
The Annual Air Quality and Climate Bulletin of the World Meteorological Organization explains the negative impacts of aerosols, including fine particulate matter, and tropospheric ozone on human health.
This bulletin, the sixth in the series, is based on satellite observations, atmospheric models, data assimilation products, monitoring networks and a series of articles written by the scientific community that advises the WMO on air quality issues.
The document was released on International Clean Air Day for Blue Skies, 7 September, and provides an overview of the most important aspects of air quality and climate change in 2025, emphasizing the strong links between air quality and climate change.




