Delhi's air pollution worsened on Wednesday, with visibility dropping sharply due to thick smog and a seasonal drop in temperature, raising concerns about flight delays. The Indian capital recently surpassed Lahore, Pakistan, to become the world’s most polluted city, according to Swiss air quality monitor IQAir. The city’s Air Quality Index (AQI) reached hazardous levels over 1,000, far above the 301 AQI level considered dangerous.
Delhi’s winter pollution spike is attributed to trapped emissions from vehicles and industries, compounded by smoke from illegal crop burning in nearby Punjab and Haryana. IQAir reported PM2.5 levels—tiny particles harmful to human health—at more than 120 times the WHO's recommended safe threshold. While India’s pollution control authority measured Delhi’s AQI at 350, this difference highlights various measurement methods, noted climate expert Gufran Beig.
Low visibility prompted the Indira Gandhi International Airport to implement special procedures, with potential flight delays. Cooler conditions, including a temperature drop to 17°C, could worsen smog levels as sunlight remains obstructed. In response, Delhi authorities are considering measures like artificial rain, and nearby Pakistan’s Punjab province has taken steps to reduce exposure, including school closures and early market shutdowns.
