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Lahore, Delhi choke as air pollution spikes in parts of South Asia
Lahore’s AQI hit 447, while Delhi’s pollution controls began as cold weather and crop burning drove hazardous smog across the region.
On Nov 3, Lahore became the world's most polluted city with an AQI of 447, according to IQAir, a Swiss air quality monitoring group.
Cold, dense air traps emissions from vehicles, construction sites, and crop waste burning annually, pushing regional pollution levels to the highest in the world during this seasonal period.
Lahore's PM2.5 concentration is 60 times higher than the World Health Organization's annual exposure guideline, with particles measuring 2.5 microns or less risking deadly diseases and heart problems.
On Nov 2, Delhi authorities implemented graded pollution control measures including vehicle and construction restrictions; the Central Pollution Control Board rated the capital's air quality "very poor" with an AQI of 332.
With Diwali approaching on Nov 8, India's Supreme Court restricted fireworks to three hours each on Nov 7 and Nov 8, aiming to prevent further air quality deterioration from the festival.
Air pollution in northern India and Pakistan has risen sharply, with Lahore declared the most polluted city. New Delhi is under lockdown due to smog, with Diwali making the situation worse.