Delhi: Air quality index breaches 400-mark; govt holds off stricter curbs
Baca Juga
https://ift.tt/ZMba3VQ 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'.
donewssuper.blogspot.com ANI
donewssuper.blogspot.com ANI
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