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TOPSHOT - This photo taken on June 1, 2018 shows a cow resting on the banks of a sewage drain canal full of garbage in the Taimur Nagar slum area in New Delhi. - A sea of plastic spreads through the New Delhi slum of Taimur Nagar, a symbol of the grime and waste that makes the Indian capital one of the world's most polluted cities. India is to be the focus of World Environment Day on June 5, but it is far from the minds of the long-suffering inhabitants of Taimur Nagar. (Photo by Dominique FAGET / AFP) / TO GO WITH India-health-environment-pollution by Abhaya Srivastava (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)

TOPSHOT - This photo taken on June 1, 2018 shows a cow resting on the banks of a sewage drain canal full of garbage in the Taimur Nagar slum area in New Delhi. - A sea of plastic spreads through the New Delhi slum of Taimur Nagar, a symbol of the grime and waste that makes the Indian capital one of the world's most polluted cities. India is to be the focus of World Environment Day on June 5, but it is far from the minds of the long-suffering inhabitants of Taimur Nagar. (Photo by Dominique FAGET / AFP) / TO GO WITH India-health-environment-pollution by Abhaya Srivastava        (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)