Delhi air quality worsens ahead of Diwali as firework restrictions enter force34 minutes agoAbhishek Dey & Rachita PrasadBBC News
Getty Images A view of Delhi NH 24 shrouded in heavy smog on a cold morning amid rising air pollution levels on November 3, 2026Getty Images
Air pollution is an annual problem in Delhi and large parts of northern India

Delhi is once again battling worsening air pollution as the onset of winter brings a familiar deterioration in air quality.

The city's Air Quality Index (AQI) - which measures PM2.5, fine particulate matter that can clog lungs - has crossed 300, entering the "very poor" category and raising health concerns for millions of residents.