The leak was caused by a series of mechanical and human errors in the pesticide producing plant, operated by the Union Carbide Corporation, a U.S.-based multinational. At night of December 2-3, 1984, a storage tank containing methyl isocyanate (MIC) at the Union Carbide pesticide plant leaked gas into the densely populated city of. The final dead at least 3,000 people died from immediate exposure to the gas, and over half million of survivors suffered from debilitating conditions such as bronchial asthma corneal opacities. In addition, this effect also showed that the following generations were suffering from respiratory and ophthalmic symptoms.