Social activists hold candles during a protest against the Bhopal gas disaster verdict in the central Indian city of Bhopal June 10, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. The protesters called for the court to hand out heavier sentences. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER HEALTH) 

Victims of Bhopal gas disaster hold posters during a protest against the Bhopal gas disaster verdict in the central Indian city of Bhopal June 10, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER) 

Activists from the Communist Party of India (Marxist-Leninist) (CPI-ML) hold placards, shout slogans and burn an effigy of former chairman of Union Carbide Corporation Warren Anderson during a protest against the Bhopal gas disaster verdict in New Delhi June 10, 2010. A court on Monday convicted seven Indian former employees of U.S. chemical firm Union Carbide of negligence and sentenced them to two years in jail for the world's worst industrial accident that killed thousands in 1984. REUTERS/Mukesh Gupta (INDIA - Tags: CIVIL UNREST DISASTER) 

Activists from the Communist Party of India (Marxist-Leninist) (CPI-ML) hold placards and shout slogans during a protest against the Bhopal gas disaster verdict in New Delhi June 10, 2010. A court on Monday convicted seven Indian former employees of U.S. chemical firm Union Carbide of negligence and sentenced them to two years in jail for the world's worst industrial accident that killed thousands in 1984. REUTERS/Mukesh Gupta (INDIA - Tags: CIVIL UNREST DISASTER) 

Activists from the Communist Party of India (Marxist-Leninist) (CPI-ML) hold placards, shout slogans and burn an effigy of former chairman of Union Carbide Corporation Warren Anderson during a protest against the Bhopal gas disaster verdict in New Delhi June 10, 2010. A court on Monday convicted seven Indian former employees of U.S. chemical firm Union Carbide of negligence and sentenced them to two years in jail for the world's worst industrial accident that killed thousands in 1984. REUTERS/Mukesh Gupta (INDIA - Tags: CIVIL UNREST DISASTER) 

INDIA-BHOPAL/ - 3D graphic of the Bhopal gas disaster. An Indian court on Monday convicted former employees of U.S. chemical firm Union Carbide for the world's worst industrial accident that killed thousands in 1984. RNGS (SIN01) 

INDIA-BHOPAL/ - 3D graphic of the Bhopal gas disaster. An Indian court on Monday convicted former employees of U.S. chemical firm Union Carbide for the world's worst industrial accident that killed thousands in 1984. RNGS (SIN01) 

Victims of the Bhopal gas disaster wearing masks attend a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

A victim of the Bhopal gas disaster faints during a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

Victims of the Bhopal gas disaster wear masks representing India's Prime Minister Manmohan Singh (L) and former chairman of Union Carbide Corporation Warren Anderson (C) attend a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

Victims of the Bhopal gas disaster, wearing masks representing India's Prime Minister Manmohan Singh (L) and former chairman of Union Carbide Corporation Warren Anderson, attend a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

Victims of the Bhopal gas disaster attend a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

A victim of the Bhopal gas disaster attends a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

A victim of the Bhopal gas disaster reacts during a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY) 

A victim of the Bhopal gas disaster attends a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST DISASTER SOCIETY IMAGES OF THE DAY) 

A victim of Bhopal gas tragedy attends a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST CRIME LAW DISASTER SOCIETY) 

Victims of Bhopal gas tragedy attend a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST CRIME LAW DISASTER SOCIETY) 

Victims of Bhopal gas tragedy hold posters during a demonstration outside a court in the central Indian city of Bhopal June 7, 2010. An Indian court on Monday sentenced seven people to two years each in prison for negligence in failing to prevent one of the world's worst industrial accidents that killed thousands of people in 1984. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST CRIME LAW DISASTER SOCIETY) 

Protestors demonstrate outside India Prime Minister Manmohan Singh's office in New Delhi May 4, 2010. Dozens of survivors on Tuesday gathered to file "Right to Information" requests regarding the civil nuclear liability bill and its relationship with the lessons of the Union Carbide disaster in Bhopal, according to non-governmental organisations (NGO) 'Bhopal Group for Information and Action' and 'Children against Dow Carbide'. Under the "Right to Information act", citizens may request the release of information from a government body, who then will be required to respond within 30 days. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER POLITICS) 

A protestor holds a placard during a protest outside India Prime Minister Manmohan Singh's office in New Delhi May 4, 2010. Dozens of survivors on Tuesday gathered to file "Right to Information" requests regarding the civil nuclear liability bill and its relationship with the lessons of the Union Carbide disaster in Bhopal, according to non-governmental organisations (NGO) 'Bhopal Group for Information and Action' and 'Children against Dow Carbide'. Under the "Right to Information act", citizens may request the release of information from a government body, who then will be required to respond within 30 days. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER POLITICS) 

Victims of the Bhopal gas tragedy hold placards portraying India's Prime Minister Manmohan Singh during a protest in New Delhi April 15, 2010. Dozens of victims on Thursday held a protest demanding the speedy resolution of their demands and legal action against Union Carbide and Dow and an empowered commission for rehabilitation of the victims, a media release said. More than 3,500 people died in the world's worst industrial disaster after a poisonous gas spewed out of a factory in 1984. REUTERS/Amit Dave (INDIA - Tags: CIVIL UNREST SOCIETY ENERGY) 

Local activists attend a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS ANNIVERSARY CONFLICT) 

Local activists attend a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA ANNIVERSARY CONFLICT DISASTER ENVIRONMENT) 

Local activists burn an effigy depicting Union Carbide Corp, now owned by Dow Chemical, during a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT ANNIVERSARY CONFLICT) 

Local activists burn an effigy depicting Union Carbide Corp, now owned by Dow Chemical, during a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT ANNIVERSARY CONFLICT) 

Local activists attend a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA ANNIVERSARY CONFLICT DISASTER ENVIRONMENT) 

A local activist attends a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT ANNIVERSARY CONFLICT) 

A local activist attends a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT ANNIVERSARY CONFLICT) 

Local activists attend a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA ANNIVERSARY CONFLICT DISASTER ENVIRONMENT) 

Local activists attend a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA ANNIVERSARY CONFLICT DISASTER ENVIRONMENT) 

Local activists attend a demonstration to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 3, 2009. The Union Carbide plant in the central city of Bhopal, now owned by Dow Chemical, left a potent legacy when it accidentally released toxic gases into the air, killing thousands of people and causing many more to suffer in the world's most deadly industrial disaster. In the early hours of December 3, 1984, around 40 metric tonnes of toxic methyl isocyanate (MIC) gas leaked into the atmosphere and was carried by the wind to the surrounding slums. The government says around 3,500 died as a result of the disaster. Activists however calculate that 25,000 people died in the immediate aftermath and the years that followed. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT CONFLICT IMAGES OF THE DAY ANNIVERSARY) 

Six-year-old Sneha Shahu (L) receives treatment in a rehabilitation centre for children who were born with mental and physical disabilities in Bhopal December 2, 2009. Bhopalis and environmental groups say many more people have been harmed since Union Carbide Corp, now part of Dow Chemical Co., developed a toxic gas leak in 1984 resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY IMAGES OF THE DAY) BEST QUALITY AVAILABLE 

Local activists attend a torch rally to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 2, 2009. In December 1984, the Union Carbide Corp pesticide plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT CONFLICT SOCIETY POLITICS) 

Local activists shout slogans during a torch rally to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 2, 2009. In December 1984, the Union Carbide Corp pesticide plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT CONFLICT POLITICS SOCIETY) 

Local activists shout slogans during a torch rally to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 2, 2009. In December 1984, the Union Carbide Corp pesticide plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT CONFLICT POLITICS SOCIETY IMAGES OF THE DAY) 

A woman walks with her child in a slum area near the Union Carbide Corp pesticide plant in Bhopal December 2, 2009. In December 1984, the plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY IMAGES OF THE DAY) 

Eighty-year-old Rampyari Bai (R) and her sick son Bhawarlal, both affected by poison gas, sit in front of her home in a slum area near the Union Carbide Corp pesticide plant in Bhopal December 2, 2009. In December 1984, the plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

Local activists hold candles during a vigil to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 2, 2009. In December 1984, the Union Carbide Corp pesticide plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

A woman holds a candle during a vigil to mark the 25th anniversary of the Bhopal gas disaster in Bhopal December 2, 2009. In December 1984, the Union Carbide Corp pesticide plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

A woman walks in front of water tanks in a slum area near the Union Carbide Corp pesticide plant in Bhopal December 2, 2009. In December 1984, the plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT) 

Children climb up a wall with murals which surrounds the Union Carbide Corp pesticide plant in Bhopal December 2, 2009. In December 1984, the plant developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

Sunita Shahu holds her handicapped two-year-old boy Dewang in a rehabilitation centre for children who were born with mental and physical disabilities in Bhopal December 2, 2009. Bhopalis and environmental groups say many more people have been harmed since Union Carbide Corp, now part of Dow Chemical Co., developed a toxic gas leak in 1984 resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disaster. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

A girl collects water in a slum area next to the Union Carbide Corp pesticide plant in Bhopal December 2, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

A girl carries water in a slum area next to the Union Carbide Corp pesticide plant in Bhopal December 2, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

Women collect water in a slum area next to the Union Carbide Corp pesticide plant in Bhopal December 2, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

Fourteen-year-old Suraj Raghuwanshi is comforted by her mother in a rehabilitation centre for children who were born with mental and physical disabilities in Bhopal December 2, 2009. Bhopalis and environmental groups say many more people have been harmed since Union Carbide Corp, now part of Dow Chemical Co., developed a toxic gas leak in 1984 resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disaster. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

Six-year-old Sneha Shahu is comforted by her mother as they wait for treatment in a rehabilitation centre for children who were born with mental and physical disabilities in Bhopal December 2, 2009. Bhopalis and environmental groups say many more people have been harmed since Union Carbide Corp, now part of Dow Chemical Co., developed a toxic gas leak in 1984 resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disaster. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

Six-year-old Sneha Shahu (L) receives treatment in a rehabilitation centre for children who were born with mental and physical disabilities in Bhopal December 2, 2009. Bhopalis and environmental groups say many more people have been harmed since Union Carbide Corp, now part of Dow Chemical Co., developed a toxic gas leak in 1984 resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY IMAGES OF THE DAY) FOR BEST QUALITY IMAGE: ALSO SEE GM1E63C1NR001 

Mothers wait with their children for treatment in a rehabilitation centre for children who were born with mental and physical disabilities in Bhopal December 2, 2009. Bhopalis and environmental groups say many more people have been harmed since Union Carbide Corp, now part of Dow Chemical Co., developed a toxic gas leak in 1984 resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disaster. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT SOCIETY) 

A woman dries clothes on the outer wall of the Union Carbide Corp, now part of Dow Chemical Co., pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT HEALTH BUSINESS) 

A woman carries water in a slum area next to the Union Carbide Corp, now part of Dow Chemical Co., pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS HEALTH) 

Seventy-year-old Raisa Bee, who was affected by poison gas when the Union Carbide Corp, now part of Dow Chemical Co., pesticide plant in December 1984 developed a toxic gas leak, waits for her treatment in a clinic in Bhopal December 1, 2009. The toxic gas leak resulted in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT HEALTH BUSINESS) 

Forty-year-old Somram Bai, who was affected by toxic gas, holds her five-year-old daughter Minkhi who suffers from underdeveloped legs and feet in a slum area next to the Union Carbide Corp, now part of Dow Chemical Co., pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT HEALTH BUSINESS) 

A handicapped man walks in a slum area next to the Union Carbide Corp, now part of Dow Chemical Co, pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS SCI TECH HEALTH SOCIETY) 

A handicapped man walks in a slum area next to the Union Carbide Corp, now part of Dow Chemical Co, pesticide plant in Bhopal December 1, 2009 which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness.REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS SCI TECH HEALTH IMAGES OF THE DAY SOCIETY) 

Broken valves are left in the former laboratory of a Union Carbide Corp, now part of Dow Chemical Co, pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS SCI TECH HEALTH) 

Chemical bottles are left in the former laboratory of a Union Carbide Corp, now part of Dow Chemical Co, pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS SCI TECH HEALTH) 

Chemical bottles are left in the former laboratory of a Union Carbide Corp, now part of Dow Chemical Co, pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS SCI TECH HEALTH) 

A security guard walks in front of the Union Carbide Corp, now part of Dow Chemical Co, pesticide plant in Bhopal December 1, 2009, which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath, in what is called one of the world's worst industrial disasters. Bhopalis and environmental groups say many more people have been harmed since then by pollutants seeping out of the plant site into ground water, which they contend have caused health problems for nearby residents including cancer, growth retardation and dizziness. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT BUSINESS SCI TECH IMAGES OF THE DAY) 

Security guards play cards on the roof of the former control room of the Union Carbide Corp pesticide plant in Bhopal December 1, 2009 which in December 1984 developed a toxic gas leak resulting in thousands of people dying in the aftermath. Local activists claim that many people who were exposed to the gas or by the use of contaminated water from near the factory have given birth to physically and mentally disabled children. REUTERS/Reinhard Krause (INDIA DISASTER ENVIRONMENT)