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flag Hanoi becomes world's most polluted city with PM2.5 levels 15 times above WHO guidelines.

flag Hanoi, Vietnam's capital, was recently named the world's most polluted city, with PM2.5 levels 15 times higher than WHO recommendations. flag The smog, affecting nine million residents, is due to construction, vehicle emissions, and industrial activities. flag Air quality could improve with the arrival of the monsoon season in March. flag Authorities are considering increasing electric vehicle usage to combat pollution.

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