"layer"

#13221079

20 January 2026

A view from a passenger window shows the aircraft wing with Star Alliance markings above a cloud layer during a flight over Poland, on January 17, 2026.

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#13221080

20 January 2026

A view from a passenger window shows the aircraft wing with Star Alliance markings above a cloud layer during a flight over Poland, on January 17, 2026.

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#13220994

20 January 2026

A dawn aerial view shows clouds and fog over Warsaw, Poland, on January 17, 2026, with a Star Alliance-marked aircraft wing and runway area visible below shortly after departure from Warsaw Chopin Airport.

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#13221132

20 January 2026

A sunset view from a passenger window shows the aircraft wing with Star Alliance markings above clouds during a flight from Szczecin to Warsaw, Poland, on January 18, 2026.

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#13220693

20 January 2026

KRAKOW, POLAND, JANUARY 20: View of Krakow's suburban district skyline obscured by heavy air pollution, seen from Krakus Mound, during very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220722

20 January 2026

KRAKOW, POLAND, JANUARY 20: The city of Krakow introduced free public transport as air pollution exceeded safety limits, during very high levels of PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220689

20 January 2026

KRAKOW, POLAND, JANUARY 20: A view over Krakow seen from Krakus Mound, during a very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220690

20 January 2026

KRAKOW, POLAND, JANUARY 20: View of Krakow's suburban district skyline obscured by heavy air pollution, seen from Krakus Mound, during very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220691

20 January 2026

KRAKOW, POLAND, JANUARY 20: A view over Krakow seen from Krakus Mound, during a very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220692

20 January 2026

KRAKOW, POLAND, JANUARY 20: A view over Krakow seen from Krakus Mound, during a very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220701

20 January 2026

KRAKOW, POLAND, JANUARY 20: An information board displays high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220702

20 January 2026

KRAKOW, POLAND, JANUARY 20: A view over Krakow seen from Krakus Mound, during a very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220719

20 January 2026

KRAKOW, POLAND, JANUARY 20: View of Krakow's suburban district skyline obscured by heavy air pollution, seen from Krakus Mound, during very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220720

20 January 2026

KRAKOW, POLAND, JANUARY 20: A view over Krakow seen from Krakus Mound, during a very high levels of PM2.5 and PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220675

20 January 2026

KRAKOW, POLAND, JANUARY 20: Significant traffic moves amid very high levels of PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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#13220677

20 January 2026

KRAKOW, POLAND, JANUARY 20: Street in central Krakow during very high levels of PM10 air pollution in Krakow, Poland, on January 20, 2026. A thick layer of smog persisted throughout the day as air quality indicators reached 'Very Unhealthy' levels (AQI over 200), ranking the city among the world's most polluted for the date.

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