Delhi's air quality dips into 'severe' category

The air quality index from 0 to 100 is considered 'good', 100 to 200 'moderate', 200 to 300 'poor', 300 to 400 'very poor' and from 400 to 500 or above 'severe'.

Delhi's air quality dips into 'severe' category
Grap-3 has been lifted in the national capital but the government is trying to ensure that Grap-1 and 2 are strictly implemented. Image: ANI

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