The Bhopal gas tragedy was one of the worst industrial disasters in history. In 1984, a leak of methyl isocynate gas from a pesticide plant in Bhopal, India killed thousands and injured hundreds of thousands more. Contributing factors included the plant's lax safety systems and emergency procedures, its proximity to dense residential areas, and failures to address previous issues at the plant. In the aftermath, Union Carbide provided some aid but over 20,000 ultimately died and many suffered permanent injuries or birth defects from the contamination.