The Bhopal gas tragedy was one of the world's worst industrial disasters that occurred in 1984 in Bhopal, India. A leak of methyl isocyanate gas and other chemicals from a Union Carbide India Limited pesticide plant exposed hundreds of thousands of people to toxic gas. Over 500,000 people were exposed to the gases and many suffered from injuries and illnesses. Official death tolls reported over 3,000 immediate deaths, while other estimates indicate the total death toll may have been over 20,000. Survivors continued to experience health issues long-term.