Beijing experiences a rare smog spike, with AQI reaching 'very unhealthy' levels after years of pollution control efforts.

Beijing experiences a rare smog spike, with AQI reaching 'very unhealthy' levels after years of pollution control efforts.

Thick smog blankets Delhi as air quality reaches 'severe' levels, prompting urgent pollution control measures across the city.

Delhi's air quality plummets to a severe AQI of 438, causing hazardous smog and prompting emergency pollution control measures.