The National Pollution Control Day is celebrated every year on 2nd of December in India in order to give the honor and memorialize the thousands of human beings who had lost their existence because of the Bhopal gas calamity. Bhopal gas tragedy was happened in the night of 2nd and 3rd December in the year 1984 because of the unintentional discharge of the poisonous chemical known as Methyl Isocyanate (also called MIC) as well as some other chemicals released from the Union Carbide Chemical Plant positioned in the city.
According to the report, more than 500,000 people (of which around 2259 were died immediately) were exposed to the poisonous gas of MIC. Later, it was declared by the government of Madhya Pradesh that around 3,787 deaths were related to the gas tragedy. In the next 72 hours, around 8,000 to 10,000 people were died whereas around 25,000 people were died later because of the gas-related diseases. It was identified as the biggest industrial pollution disaster of the history worldwide which needed serious preventive measures suddenly in order to stay away from such type of disaster in the future.