Thick dust covers chemical bottles in a laboratory at the abandoned former Union Carbide pesticide plant in Bhopal November 14, 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. REUTERS/Danish Siddiqui (INDIA - Tags: ENVIRONMENT HEALTH DISASTER BUSINESS INDUSTRIAL AGRICULTURE)

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