
Despite 77.5% drop in stubble burning, Delhi’s air quality hits a five-year post-Diwali low
Despite a 77.5 percent drop in stubble burning. long seen as a primary cause of Delhi’s winter smog, the capital’s air quality collapsed to a five-year post-Diwali low on Tuesday morning, with PM2.5 levels averaging 488 micrograms per cubic metre, nearly 100 times the World Health Organization’s exposure limit.