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Air quality in Bay

Air quality index (AQI⁺) and PM2.5 air pollution in Bay • 04:16, Nov 11

Wildfires in Bay

Real-time information

Active fires

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Aerial view of a traditional temple complex surrounded by dense greenery. Several buildings with red and orange tiled roofs are partially obscured by thick haze, reducing visibility across the landscape.
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China Air Quality Alert

Cities and industrial smoke clouds the sky
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COP31: Why air quality is key to climate health

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November 10, 2026: Ulaanbaatar among top 10 most polluted cities in the world

Which is the most polluted city in Bay?