The report additionally highlights areas the place air air pollution stays a big drawback. Photograph credit score: TR Stok/Shutterstock
Solely 13 international locations and areas world wide keep air air pollution ranges that meet the protected requirements for nice particulate matter (PM2.5) really useful by the World Well being Group (WHO), a brand new World Air High quality Report reveals, together with solely three in Europe.
The findings are taken from the 2025 World Air High quality Report.analyzed information from over 9,400 cities in 143 international locations. The report makes use of annual common concentrations of PM2.5, tiny airborne particles that pose critical well being dangers, to evaluate whether or not international locations meet WHO pointers of an annual common of lower than 5 micrograms of PM2.5 per cubic meter within the air.
The outcomes revealed a stunning image of worldwide air high quality. Whereas some international locations have managed to satisfy pointers and keep cleaner air, nearly all of international locations world wide have common ranges of PM2.5 above really useful thresholds, elevating well being issues for his or her residents.
European international locations with the cleanest air
In Europe, solely Andorra, Estonia and Iceland have been discovered to have outside air high quality that meets WHO pointers for nice particulate matter. This places these three international locations in a small group of nations on the planet whose air is taken into account comparatively “protected” by worldwide public well being requirements.
Europe’s efficiency is blended total. Though some components of the nation have comparatively good air high quality,many different areas nonetheless file PM2.5 ranges above WHO requirements. Components that have an effect on air high quality throughout the area embody car exhaust, industrial exercise, seasonal wooden burning, and cross-border air pollution flows.
World scenario: Solely 13 international locations meet WHO pointers
Along with the three European international locations, different international locations and territories that meet WHO pointers embody Barbados, Bermuda, French Polynesia, New Caledonia, Panama, Puerto Rico, RΓ©union, Australia, and several other small island states. These international locations are distinguished by the low inhabitants density of their city facilities, their typically geographical isolation, and insurance policies that assist restrict essentially the most critical sources of particulate air pollution.
However specialists warn that even when pointers are met, air high quality can range throughout the nation and will impression weak populations.
Nations with the worst air high quality
The report additionally highlights areas the place air air pollution stays a big drawback. Pakistan ranks as essentially the most polluted nation on the planet, with PM2.5 concentrations far exceeding WHO pointers. Bangladesh has adopted go well with, with cities resembling Dhaka experiencing extraordinarily excessive ranges of particulate air pollution from industrial emissions, car visitors, development mud and crop burning.
India additionally ranks as one of many international locations with the worst air high quality, with a number of cities together with Loni, Delhi, Ghaziabad and Lucknow recording a number of the highest annual PM2.5 concentrations on the planet. In Loni, the degrees have been greater than 20 occasions the WHO really useful restrict, indicating the severity of the well being threat.
South Asia as a complete ranks excessive in world rankings for poor air high quality, with a number of international locations within the area dealing with ranges of air pollution that pose critical public well being issues.
World air high quality deterioration
The worldwide scenario stays regarding. solely 14β―The proportion of cities surveyed world wide that met WHO air high quality pointers in 2025 has decreased from 17.β―p.c of the earlier yr. This decline highlights that regardless of efforts in some areas, total air high quality traits are heading within the unsuitable path.
Emissions of particulates and different pollution proceed to extend attributable to growing urbanization, elevated vitality demand, and reliance on fossil fuels. Wildfire smoke and sandstorms, intensified by local weather change, are additionally contributing to poor air high quality in some components of the world.
Well being results and WHO pointers
Advantageous particulate matter (PM2.5) is well known as an essential indicator of air high quality attributable to its capacity to penetrate deep into the lungs and enter the bloodstream. Lengthy-term publicity to excessive ranges of PM2.5 is related to respiratory and cardiovascular illnesses.
WHO usually updates air high quality suggestions based mostly on the most recent scientific proof. The 2021 pointers set the annual common worth for PM2.5 at 5.β―ΞΌg/m3 is the extent at which well being dangers are considerably lowered in comparison with increased concentrations. Governments and well being authorities world wide use these pointers as a reference when creating environmental and well being insurance policies.
Regional variations and future prospects
Air high quality varies tremendously from area to area. Oceania had a better proportion of cities assembly WHO pointers attributable to geography and decrease industrial emissions, whereas components of South Asia and Africa recorded the worst air pollution ranges.
Air high quality can range extensively even inside international locations, with city facilities typically having increased concentrations of pollution than rural areas. This variation signifies that even when the nationwide common meets WHO requirements, sure communities should wrestle with unhealthy air each day.
Implications for public well being coverage
The 2025 World Air High quality Report highlights the pressing want for governments and worldwide organizations to enhance air high quality. Air air pollution should be addressed. Decreasing emissions from transport, trade and vitality manufacturing is extensively thought-about essential to bettering air high quality and decreasing well being dangers.
Coverage interventions resembling stricter emissions requirements, funding in cleaner applied sciences, and regional cooperation on air pollution prevention play a key position in attaining more healthy air. Ongoing monitoring and clear reporting are additionally thought-about important to trace progress and inform decision-making.
conclusion
Andorra, Estonia and Iceland stand out as European international locations the place air high quality meets worldwide well being pointers, however the broader world scenario stays difficult. Solely 13 international locations on the planet keep air high quality inside WHO suggestions, and international locations in South Asia, together with Pakistan, Bangladesh and India, proceed to face extreme air air pollution. This report highlights each the dimensions of the problem and the pressing want for continued motion to guard public well being and enhance air high quality in all areas.