Hanoi tops pollution rankings, seeks solutions to improve air quality
Hanoi authorities are under significant pressure to improve air quality, particularly as the city rotates in and out of the ...
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The 'world's most polluted city' that 25m tourists a year visit anyway
The Vietnamese capital of Hanoi was the world's most polluted city for much of January 2025, with the hazardous smog posing ...
What the Air Quality Index Means for Your Health—and How to Stay Safe
Learn what the air quality index (AQI) means, how it impacts your health, and how to stay safe when pollution is high.
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Where air pollution is worsening — or improving
Erin Davis/Axios Visuals Air quality is worsening in the Upper Midwest and Northern California, according to year-over-year data. Why it matters: Poor air quality can lead to long-term health problems ...