Former maintenance worker, Mohammed Yaqub, poses in his house with his old identity card from the defunct Union Carbide pesticide plant in Bhopal where he once worked November 13, 2014. On the night of December 2, 1984, the factory owned by the U.S. multinational Union Carbide Corporation accidentally leaked cyanide gas into the air, killing thousands of largely poor Indians in the central city of Bhopal. Thirty years on, the toxic legacy of this factory lives on, say human rights groups, as thousands of tonnes of hazardous waste remains buried underground . REUTERS/Danish Siddiqui (INDIA - Tags: ENVIRONMENT HEALTH DISASTER BUSINESS INDUSTRIAL AGRICULTURE TPX IMAGES OF THE DAY)

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