Pakistan, Oct. 25 -- Lahore became the world's most polluted city on Saturday, with its Air Quality Index (AQI) reaching 363. Experts called the air quality "extremely hazardous" for human health. New Delhi ranked second with an AQI of 260, while Faisalabad recorded a staggering 539, putting it in the "most hazardous" category. Other Punjab cities, including Gujranwala, Multan, and Sialkot, also saw dangerous pollution levels.

Environmental experts blamed vehicle emissions, industrial smoke, crop residue burning, and cross-border smog from India for worsening the crisis. Traffic congestion and factory pollution heavily impact Lahore and Faisalabad. Karachi suffers from port-related pollution and urban crowding, while Islamabad and Rawalp...