What is the fine-grained topic of the following text: The accidental release of methyl isocyanate (MIC) on December 2 and 3, 1984, at the Union Carbided India Ltd. (UCIL) pesticide manufacturing plant in Bhopal, India, killed at least 1,750 people, and probably as many as 2,500, while injuring 50,000 or more. Only return the topic.
The Bhopal Gas Tragedy