Diwali Night May Plunge Delhi's Air Quality to 'Severe' Level, Study Warns

On Tuesday, India's capital Delhi recorded a 24-hour average air quality index (AQI) of 303. But on Wednesday morning, the air quality in the city's Jantar Mantar area was in the "very unhealthy" category at 222.28. Earlier this year, the World Health Organisation updated Global Air Quality Guidelines (AQGs).