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Hanoi Declared World's Most Polluted City, Authorities Seek Action

Residential buildings are shrouded behind heavy air pollution in Hanoi on January 3, 2025. (Photo by Nhac NGUYEN / AFP)
Residential buildings are shrouded behind heavy air pollution in Hanoi on January 3, 2025. (Photo by Nhac NGUYEN / AFP)
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Hanoi Declared World's Most Polluted City, Authorities Seek Action

Residential buildings are shrouded behind heavy air pollution in Hanoi on January 3, 2025. (Photo by Nhac NGUYEN / AFP)
Residential buildings are shrouded behind heavy air pollution in Hanoi on January 3, 2025. (Photo by Nhac NGUYEN / AFP)

Vietnam's capital Hanoi has been covered in thick smog over recent weeks, putting it at the top of a list of the world's most polluted cities, as the government said it would push for more electric vehicles (EVs) to alleviate the problem.
Levels of hazardous small particles, known as PM2.5, were measured at 266 micrograms per cubic meter in Hanoi early on Friday, the highest reading among a list of most-polluted cities, according to AirVisual, which provides independent global air pollution information via a phone app.
The Southeast Asian country, a regional manufacturing hub with one of the fastest-growing economies in Asia, has reported severe air pollution in its major cities for years, particularly in Hanoi, Reuters said.
The thick smog is mostly caused by heavy traffic, trash burning and industrial activities.
"We the elderly can feel it very clearly when we suffer from respiratory problems that lead to breathing difficulties," Luu Minh Duc, a 64-year-old resident of the city, said. "The situation seems to get worse recently."
Young people are also complaining.
"At first I thought it was foggy ... but later I found out that it is actually fine dusts that reduce my vision and make me feel like it is not healthy to breathe," said 21-year-old student Nguyen Ninh Huong.
Speaking at a meeting with the transport ministry on Thursday, Deputy Prime Minister Tran Hong Ha called for an accelerated transition to electric vehicles (EVs) as part of the efforts to reduce pollution, state media reported.
So far Hanoi has a target for at least 50% of buses and 100% of taxis to be EVs by 2030.
"This is the responsibility of the state to the people, and there must be specific and timely actions," Ha was quoted as saying by the Tien Phong newspaper.
The ministries of natural resources, environment and health did not immediately respond to Reuters' requests for comment.

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Firefighters Battle a Wildfire Burning Out of Control on the Greek Island of Chios

A firefighting helicopter during firefighting operations on Chios Island, Greece, 24 June 2025. EPA/KOSTAS KOURGIAS
A firefighting helicopter during firefighting operations on Chios Island, Greece, 24 June 2025. EPA/KOSTAS KOURGIAS
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Firefighters Battle a Wildfire Burning Out of Control on the Greek Island of Chios

A firefighting helicopter during firefighting operations on Chios Island, Greece, 24 June 2025. EPA/KOSTAS KOURGIAS
A firefighting helicopter during firefighting operations on Chios Island, Greece, 24 June 2025. EPA/KOSTAS KOURGIAS

Hundreds of firefighters backed up by aircraft were battling a wildfire burning out of control for the third day on the eastern Aegean island of Chios Tuesday, with authorities issuing multiple evacuation orders.

Towering walls of flames tore through forest and agricultural land on the island, where authorities have declared a state of emergency and have sent firefighting reinforcements from Athens, the northern city of Thessaloniki and the nearby island of Lesbos, said the Associated Press.

By Tuesday morning, the fire department said 444 firefighters with 85 vehicles were tackling the blaze on scattered fronts. Eleven helicopters and two water-dropping planes were providing air support.

Emergency services have issued evacuation orders for villages and settlements in the area since Sunday, when fires broke out near the island’s main town. The fire department has sent an arson investigation team to Chios to examine the cause of the blaze.

“We are faced with simultaneous fires in multiple, geographically unconnected parts of the island — a pattern that cannot be considered coincidental,” Climate Crisis and Civil Protection Minister Giannis Kefalogiannis said Monday from Chios. Authorities, he said, were “very seriously examining the possibility of an organized criminal act, in other words arson.”

The minister said police forces on the island had been reinforced, while military patrols had been doubled.

“Whoever thinks that they can play with the lives of citizens and cause chaos with premeditated actions will be led to court,” Kefalogiannis said. “Arson is a serious crime and will be dealt with as such.”

Wildfires are frequent in Greece during its hot, dry summers. In 2018, a massive fire swept through the seaside town of Mati, east of Athens, trapping people in their homes and on roads as they tried to flee. More than 100 died, including some who drowned trying to swim away from the flames.