Bhopal: On the night of December 2 and the following day in 1984, people of Bhopal experienced hell as there was a gas leak at the Union Carbide India Limited (UCIL). The gas that leaked at the pesticide plant killed nearly 3,500 people instantly in Bhopal. The death toll is estimated between 15,000 and 20,000. More than 5,00,000 people were exposed to methyl isocyanate gas. The next generations too are suffering due to the remains of the toxic element that has not been eradicated.