As Diwali celebrations recede, Delhi’s air quality remains in the “very poor” category and is expected to deteriorate further. The pollution crisis has escalated concerns not only for public health but also for India’s economic outlook. On Friday, Delhi residents woke to a thick smog enveloping the city, with pollution levels in Anand Vihar registering in the “severe” category. Data from the Central Pollution Control Board shows that Delhi’s air quality index (AQI) has surpassed 300, with pollutant PM2.5 levels recorded at 145 micrograms per cubic meter, a figure significantly above the World …