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PM2.5 concentration
Hanoi air quality improves in pandemic year but still a concern

Hanoi air quality improves in pandemic year but still a concern

Air quality in the Vietnamese capital Hanoi improved in 2020 but was still the 12th worst among cities in the world.
Hanoi air pollution worst in five years, says government report

Hanoi air pollution worst in five years, says government report

 
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