Bhopal, Dec 02 (ANI): Survivors of Bhopal gas tragedy in Madhya Pradesh burnt effigies and demanded punishment to guilty. An NGO, Bhopal Gas Peedit Nirashrit Pensionbhogi Sangharsh Morcha (Bhopal Gas Victims Destitute Pension Front) staged a protest on Sunday and demanded severe punishment for people whose negligence caused the world's worst industrial disaster in Bhopal. On December 03, 1984, a pesticide factory owned by the U.S. multinational, Union Carbide, accidentally released about 40 metric tonnes of deadly methyl isocyanate gas.