Twenty-five eld agone this period of time, in the early time period of Gregorian calendar month. 3, 1984, large amounts of water entered a tank at the Union Carbide manufacturing plant in Bhopal, Asian country. That water reacted with the 42 stacks of methyl group salt inside, rise temperature and pressure so high that it began discharge large amounts of gas ready-made up of methyl group salt, phosgene, hydro