Lahore's air quality index surges past 1,000-mark once again on Wednesday with the city topping the global charts for highest air pollution levels once again.The city's AQI, as per Swiss

Pakistani officials say dangerously poor air quality has forced the provincial government in Lahore to close primary schools for a week.

Dangerously poor air quality on Monday forced Pakistani authorities in the cultural capital of Lahore to close primary schools for a week, government officials said, after the air-quality index hit a record high over the weekend.

A toxic cloud of smog has swept over Pakistan and India, causing one of Pakistan's major cities to put schools on lockdown. On Sunday, the capital of the Punjab region of Pakistan, Lahore, held the real-time top spot as the world's most polluted city,