London issues high air pollution alert as fog traps pollutants

London issued a high air pollution warning on Monday after dense fog and weak winds trapped pollutants overnight. The event is localized and weather-driven, with no indication of a broader regional crisis. It matters as a public-health concern and a reminder of urban air-quality vulnerabilities.

AI disclosure: Model-written summary of the source, not a verified fact. Check the sources. How Mosaic works