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Air quality technology company IQAir reports that Hanoi, Vietnam, has the worst air pollution of any city on

2024–25 Ethiopian earthquakes — Air quality technology company IQAir reports that Hanoi, Vietnam, has the worst air pollution of any city on Earth, with levels of hazardous small particles, known as PM2.5, measur

Published January 3, 2025· Updated October 28, 2026·1 min read

Context: 2024–25 Ethiopian earthquakes.

Air quality technology company IQAir reports that Hanoi, Vietnam, has the worst air pollution of any city on Earth, with levels of hazardous small particles, known as PM2.5, measured at 266 micrograms per cubic metre. [https://www.reuters.com/world/asia-pacific/hanoi-declared-worlds-most-polluted-city-authorities-seek-action-2025-01-03/ (Reuters)]

Event summary via Wikipedia Current Events (2025-01-03).