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What makes Delhi the most polluted city in the world

What makes Delhi the most polluted city in the world

Delhi, meanwhile, witnessed one of its worst smog of the season, with visibility remaining less than 800 metres through Monday. PM 2.5 levels were in the 'severe' category in many parts of the city, with the most polluted spot, Anand Vihar, showing levels up to 530 mcg/cubic m between 2.30pm and 8pm.