In the year 2025, Pakistan has stood first in the list of most polluted countries in the world. According to the report of Swiss air quality monitoring company IQAir, the level of PM2.5 in Pakistan was found to be 13 times more than the standards set by the World Health Organization. These are small and dangerous particles which can enter the body through inhalation and cause serious diseases.
The report states that out of 143 countries and territories, 130 countries could not meet WHO standards. According to WHO, the safe level of PM2.5 should be 5 micrograms per cubic meter, but in most countries it was much higher than this. Only 13 countries and territories could meet this standard in the year 2025, which is more than in 2024, when only 7 countries were able to meet this level.
130 out of 143 countries did not meet WHO standards
In the list of most polluted countries Pakistan After this, Bangladesh stood second and Tajikistan stood third. Whereas Chad, which was the most polluted country in 2024, has come to fourth place this time. However, the report also says that the decrease in PM2.5 levels in Chad may also be due to lack of data.
Christie Chester Schroder, the lead author of the report, said that data from many countries has decreased due to the US shutting down a global monitoring program in March. After this decision, the major data source for many countries ended, due to which a decline is visible in some figures, but the actual situation is not clear. For this reason Burundi, Turkmenistan and Togo were not included in the 2025 report.
Talking about cities, Loni was the most polluted city in the world, where the average level of PM2.5 was recorded at 112.5 micrograms. After this Hotan remained in second place. Among the 25 most polluted cities in the world IndiaOnly cities of Pakistan and China were included. According to the report, only 14 percent of cities could meet WHO standards in 2025, which is less than 17 percent in 2024. At the same time, the effect of the forest fire in Canada was seen in America and Europe, due to which the level of PM2.5 increased there.
Only 14 percent cities could meet clean air standards
Some countries have performed better in this matter. Countries like Australia, Iceland, Estonia and Panama met WHO standards. Whereas in Laos, Cambodia and Indonesia, there was a decrease in pollution due to weather. Overall, PM2.5 levels decreased in 75 countries during 2025, while it increased in 54 countries. This report shows that air pollution still remains a major challenge in most parts of the world.
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