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AP Photo
In this July 14, 2017 photo, Baburam sweeps domestically produced petroleum coke to be transported onto trucks hired by local factories in Rampur about 210 kilometers (130 miles) from New Delhi, India. The petcoke being burned in countless factories and plants is contributing to dangerously filthy air in India, which already has many of the world’s most polluted cities. India’s energy-hungry industries like petcoke because it’s cheaper and burns hotter than coal; they also defend their use by saying they’re recycling a waste that’s being produced anyway. (AP Photo/Vaishnavee Sharma)