In 1984, a chemical leak in central India killed thousands in a single night. Forty years later, we still can't agree on how many died, and almost no one was ever held responsible. What happened At around midnight on December 3, 1984, approximately 40 tons of methyl isocyanate gas, which is toxic, leaked out of a pesticide plant near Bhopal, a city in central India. The plant was run by Union Carbide India Limited and was majority-owned and controlled by Union Carbide Corpora