Bhopal Gas Leak 1984: Causes, Impact, and Post-Disaster Measures

PWOnlyIAS December 03, 2024 06:30 8895 0

The Bhopal Gas Leak tragedy is one of the biggest industrial disasters of all time, took place on the night of December 2 and 3, 1984. Know more about Bhopal Gas leak tragedy and its causes here.

Bhopal Gas Leak 1984: Causes, Impact, and Post-Disaster Measures

The Bhopal Gas Leak Tragedy, often regarded as the world’s worst industrial disaster, occurred on the night of December 2-3, 1984, in Bhopal, Madhya Pradesh. A catastrophic leak of methyl isocyanate (MIC) gas from the Union Carbide India Limited (UCIL) pesticide plant exposed over 500,000 people to the toxic substance. This disaster led to immediate and long-term devastation, causing thousands of deaths, severe health complications, and environmental damage. The tragedy highlighted critical lapses in industrial safety, regulatory oversight, and emergency preparedness, serving as a grim reminder of the need for stringent safety protocols in industrial operations.

What was the Bhopal Gas Leak 1984 Tragedy?

The Bhopal Gas Leak is often considered the worst industrial disaster in history, which not only resulted in deaths but also chronic diseases.

  • Cause of Bhopal Gas Leak: The disaster was caused on December 3, 1984, when 40 tons of toxic methyl isocyanate (MIC) gas leaked out of a pesticide factory in the city of Bhopal. 
  • Occurrence of Events: The Union Carbide factory contained three underground tanks that were used to store liquid Methyl Isocyanate (MIC).
    • Each of these tanks was pressurized with inert nitrogen gas, which allowed liquid MIC to be pumped out of each tank as needed.
    • On 2nd December, water accidentally entered one of the underground tanks holding MIC, triggering an instant exothermic reaction caused by the presence of contaminants, high ambient temperatures, and various other factors.
    • Gaseous MIC began escaping from atmospheric vents, with 40 tonnes of the highly toxic gas escaping within 2 hours.
  • Symptoms of Exposure: Symptoms of the gas exposure included coughing, severe eye irritation, a feeling of suffocation, burning in the respiratory tract, breathlessness, stomach cramps, and vomiting
  • Causes of Death: Choking, reflexogenic circulatory collapse, and pulmonary edema were the primary causes of death in people.

National Pollution Control Day

National Pollution Control Day is observed annually on December 2 in India to honor the lives lost in the Bhopal Gas Tragedy of 1984 and to raise awareness about the importance of pollution control. On December 2, 2024, the Bhopal gas leak tragedy will mark the 40th anniversary. The day serves as a reminder to implement stricter environmental regulations, promote sustainable practices, and encourage individuals and industries to adopt eco-friendly measures. It emphasizes the need to reduce air, water, and soil pollution for a healthier and safer environment for future generations.

Root Causes of the Bhopal Gas Leak Disaster 

There were many root causes of the Bhopal Gas Leak disaster. Some of the root cause of the Bhopal Gas Leak Disaster:

  • Lack of Knowledge: The workers in charge of handling the plant did not have knowledge about the dangerous nature of the chemicals and thus observed general laxity in safety rules.
  • Emergency Plans: The plant was being run without adequate safety measures, including emergency plans in case of disaster.
  • Lack of Specific Laws: There was a lack of specific laws in India at the time for handling such matters related to industrial leaks.
  • Poor Maintenance of Equipment: Most of the safety systems in the factory were malfunctioning and many valves and lines were in poor condition.
    • Flare towers and sirens were not in operation. Water hoses were not strong enough to contain gas leak from a height.
  • Safety Neglect: There were allegations of neglect of safety equipment to save costs, including safety valves, refrigeration of tanks, etc.
  • Underinvestment: Investments in improving the plant were stopped. There were reduced funds for maintenance, and employee training was also compromised.

Union Carbide India Limited (UCIL)

Union Carbide India Limited (UCIL) was an Indian subsidiary of the American multinational Union Carbide Corporation (UCC). Established in 1934, UCIL operates in various industrial sectors, including chemicals, metals, and agricultural products. Its pesticide manufacturing plant in Bhopal, Madhya Pradesh, became the site of the Bhopal Gas Tragedy in 1984, one of the world’s deadliest industrial disasters.

UCIL manufactured pesticides and related products, with methyl isocyanate (MIC) being a key ingredient in producing Sevin, a pesticide. The Bhopal plant was set up in 1969 to meet the growing agricultural demand in India. However, the plant faced issues such as financial losses, safety oversights, and reduced production, which led to cost-cutting measures, ultimately contributing to the disaster.

Particulars Key Facts About Union Carbide India Limited (UCIL)
Established 1934
Parent Company Union Carbide Corporation (UCC), USA
Industry Chemicals, metals, and agriculture
Bhopal Plant Established in 1969 to manufacture pesticides like Sevin
Key Chemical Methyl Isocyanate (MIC), a highly toxic ingredient used in pesticide production
Bhopal Gas Tragedy Occurred on December 2-3, 1984, due to a massive leak of MIC gas
Casualties Over 3,000 immediate deaths; long-term effects on more than 500,000 people
Headquarters in India Mumbai, Maharashtra
Current Status UCIL was taken over by Eveready Industries India Limited in 1994 and is no longer operational in its original capacity.

Aftermath of Bhopal Gas Leak Tragedy

  • Deaths: The poisonous gas killed thousands of people in a short span of time, with the final number being estimated at about 25,000. 
  • Long-term Health Impact: People born in Bhopal after 1985 have a higher risk of cancer, lower education accomplishment and higher rates of disabilities.

Bhopal Gas Leak

  • Underground Water Pollution: Studies revealed that the sources of water around the factory were deemed unfit for consumption and many handpumps were sealed.
  • Displacement: A large number of people were forcibly evacuated from the site due to the fears of further leaks of gas.
  • Food Scarcity: People living in the proximity of the factory had to discard all food sources for fear of contamination.

Compensation Challenges, Legal Actions, and Post-Disaster Regulatory Measures After Bhopal Gas Leak

  • Claim Settling: The government passed the Bhopal Gas Leak Disaster (Processing of Claims) Act in 1985, giving certain powers to the Indian government for settling claims.
    • The Indian government and Union Carbide struck a mutual deal and compensation of $470 million was given by UC. However, there are complaints regarding delay in release of money.
  • Charges against Officials: Charges were filed against the Union Carbide chairman and other officials. They were released on bail and never faced punishment.
  • Post-disaster Measures after Bhopal Gas Leak:
    • Environment (Protection) Act, 1986: The law authorized the central government to take relevant measures and regulate industrial activity for environmental and public safety.
      • The act strengthens the regulations on pollution control and environment protection by hazardous industries.
    • Public Liability Insurance Act of 1991: The law provides public liability insurance for providing immediate relief to persons affected by an accident occurring while handling any hazardous substance.

The Characteristics, Uses, and Health Impacts of Methyl Isocyanate (MIC) – Root Cause of Bhopal Gas Leak

  • About: Methyl Isocyanate (MIC) is a flammable chemical that evaporates when exposed to air. It is liquid in form and has colorless pungent features.
  • Production: Methyl Isocyanate is obtained by reacting methylamine with phosgene.
  • Usage: The primary use of Methyl Isocyanate is as a chemical intermediate in the production of pesticides. 
    • It is also used in the production of polyurethane foams and plastics.
  • Density: Gaseous methyl isocyanate is slightly denser than air and hence accumulates near the ground level.
  • Incompatibility: Methyl Isocyanate reacts violently with water and is also incompatible with oxidizers, acids, alkalis, amines, iron, tin, and copper.
  • Health Damages:
    • Exposure to the chemical may cause irritation of the skin or eyes and severe ocular damage. 
    • Ingestion of the chemical could produce severe gastrointestinal irritation.
    • Inhalation of the chemical may cause severe pulmonary edema injury to the alveolar walls of the lung and death.
  • Treatment for exposure: There is no antidote available against methyl isocyanate. Treatment mainly includes removal of the victim from the contaminated area and support of respiratory and cardiovascular functions.

Conclusion

The Bhopal Gas Leak disaster remains to be one of the biggest industrial disasters of all time. The lives of people affected have never been the same.

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Bhopal Gas Leak FAQs

The disaster was caused on December 3, 1984 in the city of Bhopal, Madhya Pradesh.

The Union Carbide Company, which was a major pesticide manufacturer, was involved in the disaster.

The disaster occurred when 40 tons of toxic methyl isocyanate (MIC) gas leaked out of the Union Carbide factory.

The Union Carbide factory contained three underground tanks that were used to store liquid Methyl Isocyanate (MIC). On 2nd December, water accidentally entered one of the underground tanks holding MIC, triggering an instant exothermic reaction caused by the presence of contaminants, high ambient temperatures, and various other factors.

Environment (Protection) Act, 1986, Public Liability Insurance Act of 1991, and Bhopal Gas Leak Disaster (Processing of Claims) Act in 1985.

The gas that leaked during the Bhopal Gas Tragedy was Methyl Isocyanate (MIC), a highly toxic chemical used in pesticide production.
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