Delhi air quality plunges further, AQI remains in `very poor` category

An AQI between 0-50 is considered `good`, 51-100 `satisfactory`, 101-200 `moderate`, 201-300 `poor`, 301-400 `very poor` and 401-500 is marked as `severe`.

from Zee News :India National https://ift.tt/30j7inb

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