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Pakistan ranked as the world's most polluted country in 2025, with PM2.5 concentrations averaging 67.3 micrograms per cubic meter — up to 13 times the WHO's recommended limit of 5 micrograms per cubic meter.

Pakistan ranked as the world's most polluted country in 2025, with PM2.5 concentrations averaging 67.3 micrograms per cubic meter — up to 13 times the WHO's recommended limit of 5 micrograms per cubic meter.

Bangladesh and Tajikistan ranked second and third on the most polluted countries list, while Loni, India, recorded the highest city-level PM2.5 average at 112.5 micrograms per cubic meter — more than 22 times the WHO guideline.

Bangladesh and Tajikistan ranked second and third on the most polluted countries list, while Loni, India, recorded the highest city-level PM2.5 average at 112.5 micrograms per cubic meter — more than 22 times the WHO guideline.

Only 14% of global cities met the WHO's annual PM2.5 guideline in 2025, down from 17% the previous year. The world's 25 most polluted cities were all located in India, Pakistan and China.

Only 14% of global cities met the WHO's annual PM2.5 guideline in 2025, down from 17% the previous year. The world's 25 most polluted cities were all located in India, Pakistan and China.

The U.S. shut down its State Department global air quality monitoring program at embassies and consulates in March 2025, citing budget constraints. The Centre for Research on Energy and Clean Air reported monitoring efforts in 44 countries were weakened and six were left without any monitoring.

The U.S. shut down its State Department global air quality monitoring program at embassies and consulates in March 2025, citing budget constraints. The Centre for Research on Energy and Clean Air reported monitoring efforts in 44 countries were weakened and six were left without any monitoring.

IQAir lead report author Christi Chester Schroeder said the U.S. data loss made it "appear there was a significant drop in PM2.5 levels" in Chad, adding: "the fact of the matter is that we don't know." Burundi, Turkmenistan and Togo were excluded from the 2025 report due to data gaps.

IQAir lead report author Christi Chester Schroeder said the U.S. data loss made it "appear there was a significant drop in PM2.5 levels" in Chad, adding: "the fact of the matter is that we don't know." Burundi, Turkmenistan and Togo were excluded from the 2025 report due to data gaps.

Seventy-five countries reported lower PM2.5 levels in 2025 compared to the prior year, while 54 recorded increases. Laos, Cambodia and Indonesia saw notable reductions, largely attributed to wetter and windier La Niña weather conditions.

Seventy-five countries reported lower PM2.5 levels in 2025 compared to the prior year, while 54 recorded increases. Laos, Cambodia and Indonesia saw notable reductions, largely attributed to wetter and windier La Niña weather conditions.

Pakistan Named World's Most Polluted Country in 2025

Pakistan Named World's Most Polluted Country in 2025

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Pakistan Named World's Most Polluted Country in 2025

Pakistan Named World's Most Polluted Country in 2025

The Controversies

Trump

Michaels

Harris

Sunak

Francis

Biden

Macron

Thunberg

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Guterres

Mann

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