"Historical problem"

#13112554

20 December 2025

People walk at the Petrovaradin Fortress during fog in Novi Sad, Serbia, on December 9, 2023.

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#13112555

20 December 2025

People walk at the Petrovaradin Fortress during fog in Novi Sad, Serbia, on December 9, 2023.

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#13112553

20 December 2025

A young man stands at the Petrovaradin Fortress during fog in Novi Sad, Serbia, on December 9, 2023.

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#13088772

12 December 2025

Passengers wait and walk on a covered train platform with a train visible in the background inside the Frankfurt am Main Hauptbahnhof (Central Station) in Frankfurt, Hesse, Germany, on December 12, 2025.

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#13088774

12 December 2025

Passengers wait and walk on a covered train platform with a train visible inside the Frankfurt am Main Hauptbahnhof (Central Station) in Frankfurt, Hesse, Germany, on December 12, 2025.

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#13088775

12 December 2025

Passengers wait and walk on a covered train platform with a train visible in the background inside the Frankfurt am Main Hauptbahnhof (Central Station) in Frankfurt, Hesse, Germany, on December 12, 2025.

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#13088776

12 December 2025

Passengers wait and walk on a covered train platform with a train visible in the background inside the Frankfurt am Main Hauptbahnhof (Central Station) in Frankfurt, Hesse, Germany, on December 12, 2025.

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#13088777

12 December 2025

Passengers wait and walk on a covered train platform with a train visible in the background inside the Frankfurt am Main Hauptbahnhof (Central Station) in Frankfurt, Hesse, Germany, on December 12, 2025.

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#13088747

12 December 2025

The historic, illuminated facade of the Frankfurt am Main Hauptbahnhof (Central Station) is seen at night in Frankfurt, Hesse, Germany, on December 12, 2025, featuring its large arched glass window, the central clock, and the red DB (Deutsche Bahn) logo. People walk on the wide, dark plaza in the foreground, with decorative Christmas lights visible in the arches.

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#13088749

12 December 2025

The historic, illuminated facade of the Frankfurt am Main Hauptbahnhof (Central Station) is seen at night, featuring its large arched glass window, the central clock, and the red DB (Deutsche Bahn) logo in Frankfurt, Hesse, Germany, on December 12, 2025.

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#12992224

16 November 2025

Thick smog covers Delhi, India, on July 24, 2024. India's capital, with 18 million residents, has the world's most polluted air with six times the amount of small particulate matter (pm2.5) than what the World Health Organization (WHO) considers safe. The air's hazardous amount of pm2.5 can reach deep into the lungs and enter the blood, causing serious long-term health effects. The WHO declares that India has the world's highest death rate from chronic respiratory diseases. India, home to 13 of the world's top 20 polluted cities, is also the third largest emitter of greenhouse gases behind the United States and China.

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#12992250

16 November 2025

Thick smog covers Delhi, India, on July 24, 2024. India's capital, with 18 million residents, has the world's most polluted air with six times the amount of small particulate matter (pm2.5) than what the World Health Organization (WHO) considers safe. The air's hazardous amount of pm2.5 can reach deep into the lungs and enter the blood, causing serious long-term health effects. The WHO declares that India has the world's highest death rate from chronic respiratory diseases. India, home to 13 of the world's top 20 polluted cities, is also the third largest emitter of greenhouse gases behind the United States and China.

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#12992266

16 November 2025

Thick smog covers Delhi, India, on July 24, 2024. India's capital, with 18 million residents, has the world's most polluted air with six times the amount of small particulate matter (pm2.5) than what the World Health Organization (WHO) considers safe. The air's hazardous amount of pm2.5 can reach deep into the lungs and enter the blood, causing serious long-term health effects. The WHO declares that India has the world's highest death rate from chronic respiratory diseases. India, home to 13 of the world's top 20 polluted cities, is also the third largest emitter of greenhouse gases behind the United States and China.

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#12992322

16 November 2025

Thick smog covers Delhi, India, on July 24, 2024. India's capital, with 18 million residents, has the world's most polluted air with six times the amount of small particulate matter (pm2.5) than what the World Health Organization (WHO) considers safe. The air's hazardous amount of pm2.5 can reach deep into the lungs and enter the blood, causing serious long-term health effects. The WHO declares that India has the world's highest death rate from chronic respiratory diseases. India, home to 13 of the world's top 20 polluted cities, is also the third largest emitter of greenhouse gases behind the United States and China.

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#12992359

16 November 2025

Thick smog covers Delhi, India, on July 24, 2024. India's capital, with 18 million residents, has the world's most polluted air with six times the amount of small particulate matter (pm2.5) than what the World Health Organization (WHO) considers safe. The air's hazardous amount of pm2.5 can reach deep into the lungs and enter the blood, causing serious long-term health effects. The WHO declares that India has the world's highest death rate from chronic respiratory diseases. India, home to 13 of the world's top 20 polluted cities, is also the third largest emitter of greenhouse gases behind the United States and China.

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#12992362

16 November 2025

Thick smog covers Delhi, India, on July 24, 2024. India's capital, with 18 million residents, has the world's most polluted air with six times the amount of small particulate matter (pm2.5) than what the World Health Organization (WHO) considers safe. The air's hazardous amount of pm2.5 can reach deep into the lungs and enter the blood, causing serious long-term health effects. The WHO declares that India has the world's highest death rate from chronic respiratory diseases. India, home to 13 of the world's top 20 polluted cities, is also the third largest emitter of greenhouse gases behind the United States and China.

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