Q. Why is this in news ?
A. Air quality index (AQI) of Delhi slipped into ‘very poor’ category while some parts of the city saw AQI turn ‘severe’. As of 2pm, the overall AQI was 370 and eight out of 36 monitoring stations were in the ‘severe’ category, with most severely affected areas being North Delhi.
Q. What are particulates and what is their health impact?
Q. What are the health effects of gaseous pollutants?