Thick smog shrouds New Delhi after Diwali firecrackers add to seasonal pollution - NPR
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Thick smog shrouds New Delhi after Diwali firecrackers add to seasonal pollution NPR Delhi air quality deteriorates as revellers mark Diwali with illegal fireworks Reuters Smog blankets New Delhi as Diwali firecrackers worsen air quality Al Jazeera Air pollution data goes missing at several govt monitoring stations in Delhi The Hindu Delhi's toxic winter air is back - is the Indian capital prepared for pollution? BBC