“The Central Pollution Control Board (CPCB) data on the national air quality index (NAQI) shows that Delhi has more months of bad air as compared to Mumbai, Bengaluru and Chennai. Cities where air quality is as bad as Delhi include Kanpur, Varanasi and others along the Indo-Gangetic plains and that is largely because of higher emissions from industries, brick kilns and others.” The Times of India. Check out the infographic on delhiair.org. Delhi’s air worst amongst metros

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