Why is Hanoi the most polluted in the world?

Hùng Cường |

Hanoi is regularly on the list of the world's most polluted cities, with air quality indexes at warning levels for many days.

Hùng Cường
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Hanoi is the most polluted in the world, with some spots reaching extreme pollution

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On the morning of January 3, the IQAir application ranked Hanoi as the most polluted city in the world.

The two most polluted times of the day

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During the day, air pollution levels fluctuate, concentrated between 6-8am and 5-7pm.

Hanoi ranked 2nd in the world for pollution, many measuring points at hazardous levels

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Near noon on January 2, Hanoi's sky was still hazy, IQAir ranked Hanoi as the second most polluted city in the world.

Awakening the tourism potential of the Hoa Binh lake area needs more "push"

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The tourism potential of the Hoa Binh lake area is very large, but there is still a lack of infrastructure, planning and appropriate mechanisms to attract investment and sustainable development.

Avoiding functional forces, personal data traders transfer to online markets

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Without direct transactions, without meeting customers, but just spending money, personal data can be easily bought and sold at unbelievably cheap prices.

10th grade benchmark score in Ho Chi Minh City, the highest school takes 24.75 points

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On June 30, the Ho Chi Minh City Department of Education and Training (GDĐT) announced the benchmark scores for 10th grade enrollment into public high schools for the 2026-2027 school year.

Hanoi is the most polluted in the world, with some spots reaching extreme pollution

Huy Hùng |

On the morning of January 3, the IQAir application ranked Hanoi as the most polluted city in the world.

The two most polluted times of the day

Huy Hùng |

During the day, air pollution levels fluctuate, concentrated between 6-8am and 5-7pm.

Hanoi ranked 2nd in the world for pollution, many measuring points at hazardous levels

Huy Hùng |

Near noon on January 2, Hanoi's sky was still hazy, IQAir ranked Hanoi as the second most polluted city in the world.