What is Air Quality Index and what does it indicate?

Taking an important step towards raising awareness about pollution across the country, the government on Monday unveiled a National Air Quality Index with Prime Minister Narendra Modi launching a simple colour-coded tool to inform people about the quality of air they breathe.
Here is what it is all about.
In this video, we will discuss what is the Air Quality Index
and Components of AQI

Particular matter (PM)
Nitrogen Oxides NOx)
sulfur dioxide (SO2)
sulfur dioxide (SO2),
and OZONE (O3)