1980s
THEN: On the intervening night of December 3 and 4, 1984, a leak from Union Carbide’s pesticide plant in Bhopal turned the city into a toxic gas chamber, killing thousands and making it one of the world’s worst industrial disasters
NOW: Air pollution in India has assumed the proportions of a public health emergency, claiming over 1.2 million lives in 2017 alone, making it the third highest cause of death