The Hindu10m
Here are five charts that will help you understand some of the key stories from last week
The GRAP for Delhi-NCR is divided into four stages of air quality — Stage 1 for “poor” Air Quality Index (AQI) ranging ...
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Delhi AQI hits 'severe plus' as breathing equals smoking 49 cigarettes daily; PM2.5 levels 60x WHO limit
Air quality in the national capital has drastically worsened, crossing the "severe plus" category with an AQI of 481, on ...