Delhi-NCR pollution: Air quality oscillates between 'severe' and 'very poor' - Firstpost
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Delhi-NCR pollution: Air quality oscillates between 'severe' and 'very poor'

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 The hazardous smog, worst in 17 years, which has kept the national capital shrouded since Diwali on Friday lingered on, as the overall air quality oscillated between 'severe' and 'very poor' categories. (Photo: PTI)

The hazardous smog, worst in 17 years, which has kept the national capital shrouded since Diwali on Friday lingered on, as the overall air quality oscillated between 'severe' and 'very poor' categories. (Photo: PTI)

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