Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS) 

Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS TPX IMAGES OF THE DAY) 

Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS TPX IMAGES OF THE DAY) 

Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, hold bamboo sticks as they take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS) 

Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS) 

Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS) 

Volunteers of the Rashtriya Swayamsevak Sangh (RSS), India's Hindu nationalist organisation, hold bamboo sticks as they take part in a drill during a training camp in the central Indian city of Bhopal June 7, 2014. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY POLITICS) 

Activists from the Rashtriya Swayamsevak Sangh (RSS), a Hindu hardline group, hold bamboo sticks as they take part in a march in the central Indian city of Bhopal February 23, 2014. Picture taken February 23, 2014. REUTERS/Raj Patidar (INDIA - Tags: RELIGION POLITICS) 

Activists from the Rashtriya Swayamsevak Sangh (RSS), a Hindu hardline group, hold bamboo sticks as they take part in a march in the central Indian city of Bhopal February 23, 2014. Standing with Narendra Modi as he was sworn in as prime minister on the majestic forecourt of India's presidential palace was a cabinet made up almost entirely of ministers whose careers started in a hardline Hindu nationalist movement. After the stunning majority won by Modi's party in the general election, the movement that believes multi-faith India should be recognized first and foremost as a Hindu nation feels closer than ever before to achieving its goals. Hundreds of thousands of volunteers from the movement led by the RSS actively campaigned in the election, using technology and sheer manpower to mobilize voters in regions where Modi's party has traditionally been weak. Picture taken February 23, 2014. REUTERS/Raj Patidar (INDIA - Tags: RELIGION POLITICS) 

Shivraj Singh Chouhan (3rd R), chief minister of Madhya Pradesh, greets his Bharatiya Janata Party (BJP) supporters during his swearing-in ceremony in the central Indian city of Bhopal December 14, 2013. Five months before India's next elections are due, there is already an air of victory around Narendra Modi as he strides from one jam-packed rally to the next. And yet, a regional leader from his Hindu nationalist fold is quietly emerging as an alternative to lead the country. This month, Chouhan notched up a thumping election victory in Madhya Pradesh, a sprawling central state with a population larger than that of France, becoming its chief minister for a third time. Picture taken December 14, 2013. REUTERS/Raj Patidar (INDIA - Tags: POLITICS ELECTIONS) 

Shivraj Singh Chouhan (2nd R), chief minister of Madhya Pradesh, waves as Gujarat's chief minister, Hindu nationalist and the prime ministerial candidate for India's main opposition Bharatiya Janata Party (BJP) Narendra Modi (3rd L), and Rajnath Singh (R), president of BJP, look on during Chouhan's swearing-in ceremony in the central Indian city of Bhopal December 14, 2013. Five months before India's next elections are due, there is already an air of victory around Narendra Modi as he strides from one jam-packed rally to the next. And yet, a regional leader from his Hindu nationalist fold is quietly emerging as an alternative to lead the country. This month, Chouhan notched up a thumping election victory in Madhya Pradesh, a sprawling central state with a population larger than that of France, becoming its chief minister for a third time. Picture taken December 14, 2013. REUTERS/Raj Patidar (INDIA - Tags: POLITICS ELECTIONS PROFILE) 

Shivraj Singh Chouhan (2nd R), chief minister of Madhya Pradesh, greets his Bharatiya Janata Party (BJP) supporters during Chouhan's swearing-in ceremony in the central Indian city of Bhopal December14, 2013. Five months before India's next elections are due, there is already an air of victory around Narendra Modi as he strides from one jam-packed rally to the next. And yet, a regional leader from his Hindu nationalist fold is quietly emerging as an alternative to lead the country. This month, Chouhan notched up a thumping election victory in Madhya Pradesh, a sprawling central state with a population larger than that of France, becoming its chief minister for a third time. Picture taken December 14, 2013. REUTERS/Raj Patidar (INDIA - Tags: POLITICS ELECTIONS PROFILE) 

Hindu nationalist Narendra Modi, prime ministerial candidate for India's main opposition Bharatiya Janata Party (BJP), addresses his party supporters during a rally in the central Indian city of Bhopal September 25, 2013. REUTERS/Raj Patidar (INDIA - Tags: POLITICS) 

Workers light candles and offer flowers, symbolizing their solidarity with factory workers who died in Bangladesh, during a protest in Manila May 9, 2013. Nearly 800 workers were killed in the April 24 collapse of a nine-storey building that was housing garments factories in the outskirts of Dhaka, the world's deadliest industrial accident since the Bhopal disaster in India in 1984. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: POLITICS BUSINESS EMPLOYMENT) 

A worker offers candles and flowers, symbolizing their solidarity with factory workers who died in Bangladesh, during a protest in Manila May 9, 2013. Nearly 800 workers were killed in the April 24 collapse of a nine-storey building that was housing garments factories in the outskirts of Dhaka, the world's deadliest industrial accident since the Bhopal disaster in India in 1984. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: POLITICS CIVIL UNREST BUSINESS EMPLOYMENT) 

Onlookers stand at the site where a portion of a hospital collapsed in the central Indian city of Bhopal April 26, 2013. Up to 15 people are feared trapped after a section of a hospital building collapsed at Bhopal in India's central state of Madhya Pradesh on Friday. According to media reports the ceiling of the two-storey Kasturba Gandhi Hospital collapsed, trapping at least a dozen people and injuring many more. REUTERS/Raj Patidar (INDIA - Tags: DISASTER HEALTH) 

Indian security personnel detain a victim (C) of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, during a protest in Mumbai April 9, 2013. Over a hundred victims from the central Indian city of Bhopal protested on Tuesday outside the Dow Chemical Company office demanding medical care, rehabilitation and a poison free environment, according to a media release. REUTERS/Vivek Prakash (INDIA - Tags: CIVIL UNREST POLITICS BUSINESS) 

Victims of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, shout slogans and hold placards during a protest in Mumbai April 9, 2013. Over a hundred victims from the central Indian city of Bhopal protested on Tuesday outside the Dow Chemical Company office demanding medical care, rehabilitation and a poison free environment, according to a media release. REUTERS/Vivek Prakash (INDIA - Tags: CIVIL UNREST POLITICS BUSINESS) 

Activists of the youth wing of India's ruling Congress party shout slogans as they beat and burn an effigy depicting Pakistan during a protest in the central Indian city of Bhopal January 9, 2013. India slammed arch-rival Pakistan on Wednesday over a firefight in the disputed territory of Kashmir in which two of its soldiers were killed, and said the mutilation of one of the bodies was "inhuman". REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST POLITICS MILITARY) 

Activists of the youth wing of India's ruling Congress party shout slogans as they burn an effigy depicting Pakistan during a protest in the central Indian city of Bhopal January 9, 2013. India slammed arch-rival Pakistan on Wednesday over a firefight in the disputed territory of Kashmir in which two of its soldiers were killed, and said the mutilation of one of the bodies was "inhuman". Placards read; "Down with Pakistan" and "India's youth is out in the streets in honour of martyred soldiers" (bottom L). REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST POLITICS MILITARY) 

Police use water cannons to disperse activists and workers from India's Congress Party during a protest in the central Indian city of Bhopal October 4, 2012. Thousands of workers and activists on Thursday protested outside the residence of the chief minister of Madhya Pradesh, Shivraj Singh Chauhan, against the corruption and rise in crime against women allegedly under the Hindu-nationalist Bharatiya Janata Party (BJP) state government's rule, according to local media. REUTERS/Raj Patidar (INDIA - Tags: POLITICS CIVIL UNREST CRIME LAW) 

Police wield their batons against a worker from India's Congress Party during a protest in the central Indian city of Bhopal October 4, 2012. Thousands of workers and activists on Thursday protested outside the residence of the chief minister of Madhya Pradesh, Shivraj Singh Chauhan, against the corruption and rise in crime against women allegedly under the Hindu-nationalist Bharatiya Janata Party (BJP) state government's rule, according to local media. REUTERS/Raj Patidar (INDIA - Tags: POLITICS CIVIL UNREST CRIME LAW) 

Activists and workers of India's Congress Party gather to attend a protest in the central Indian city of Bhopal October 4, 2012. Thousands of workers and activists on Thursday protested outside the residence of the chief minister of Madhya Pradesh, Shivraj Singh Chauhan, against the corruption and rise in crime against women allegedly under the Hindu-nationalist Bharatiya Janata Party (BJP) state government's rule, according to local media. REUTERS/Raj Patidar (INDIA - Tags: POLITICS CIVIL UNREST CRIME LAW) 

Police use water cannons to disperse activists and workers of the India's Congress Party during a protest in the central Indian city of Bhopal October 4, 2012. Thousands of workers and activists on Thursday protested outside the residence of the chief minister of Madhya Pradesh, Shivraj Singh Chauhan, against the corruption and rise in crime against women allegedly under the Hindu-nationalist Bharatiya Janata Party (BJP) state government's rule, according to local media. REUTERS/Raj Patidar (INDIA - Tags: POLITICS CIVIL UNREST CRIME LAW) 

Protesters play dead in Westfield to campaign against Dow Chemical's sponsorship of the Olympic Games in London July 27, 2012. Dow is one of 11 international Olympic sponsors who have global marketing rights to the Games. The criticism that the company faces over Bhopal stems from Dow's acquisition of Union Carbide almost a decade after that company settled litigation linked to the gas leak at its Indian unit which killed and injured thousands. REUTERS/Neil Hall (BRITAIN - Tags: SPORT OLYMPICS CIVIL UNREST BUSINESS) 

Protesters play dead in Westfield to campaign against Dow Chemical's sponsorship of the Olympic Games in London July 27, 2012. Dow is one of 11 international Olympic sponsors who have global marketing rights to the Games. The criticism that the company faces over Bhopal stems from Dow's acquisition of Union Carbide almost a decade after that company settled litigation linked to the gas leak at its Indian unit which killed and injured thousands. REUTERS/Neil Hall (BRITAIN - Tags: SPORT OLYMPICS CIVIL UNREST BUSINESS) 

Protesters play dead in Westfield to campaign against Dow Chemical's sponsorship of the Olympic Games in London July 27, 2012. Dow is one of 11 international Olympic sponsors who have global marketing rights to the Games. The criticism that the company faces over Bhopal stems from Dow's acquisition of Union Carbide almost a decade after that company settled litigation linked to the gas leak at its Indian unit which killed and injured thousands. REUTERS/Neil Hall (BRITAIN - Tags: SPORT OLYMPICS CIVIL UNREST TPX IMAGES OF THE DAY BUSINESS) 

A victim of the 1984 Bhopal gas tragedy takes part in the "Bhopal Special Olympics 2012" at a stadium in the central Indian city of Bhopal July 26, 2012. Survivors of the Bhopal gas leak in 1984 held their own special version of the Olympic Games in India on Thursday as a form of protest against the sponsorship of the London Games by Dow Chemical. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY SPORT OLYMPICS BUSINESS) 

Victims of the 1984 Bhopal gas tragedy attend the "Bhopal Special Olympics 2012" at a stadium in the central Indian city of Bhopal July 26, 2012. Survivors of the Bhopal gas leak in 1984 held their own special version of the Olympic Games in India on Thursday as a form of protest against the sponsorship of the London Games by Dow Chemical. REUTERS/Raj Patidar (INDIA - Tags: SOCIETY SPORT OLYMPICS BUSINESS) 

Victims of the 1984 Bhopal gas tragedy pose at the "Bhopal Special Olympics 2012" at a stadium in the central Indian city of Bhopal July 26, 2012. Survivors of the Bhopal gas leak in 1984 held their own special version of the Olympic Games in India on Thursday as a form of protest against the sponsorship of the London Games by Dow Chemical. REUTERS/Raj Patidar (INDIA - Tags: SPORT OLYMPICS SOCIETY BUSINESS) 

India's former Finance Minister Pranab Mukherjee, who resigned in June to run for the presidency, waves after his meeting with Congress party members in the central Indian city of Bhopal July 11, 2012. REUTERS/Raj Patidar (INDIA - Tags: POLITICS) 

Victims of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, shout slogans during a protest against Dow Chemicals' sponsorship deal with the 2012 London Olympics Games, outside the residence of the acting President of the Indian Olympic Association (IOA) Vijay Kumar Malhotra, in New Delhi April 10, 2012. A boycott of the London Games because of Dow Chemical's sponsorship has not been mentioned by the IOA, the International Olympic Committee (IOC) said last month. The IOA has demanded London 2012 terminates its deal with the U.S. firm because of its links to the 1984 Bhopal gas disaster while there have been some calls for a boycott of the Games. REUTERS/Parivartan Sharma (INDIA - Tags: SPORT CIVIL UNREST) 

Demonstrators demanding that Dow to be dropped as an Olympics sponsor over the 1984 Bhopal disaster, which killed thousands in India, lie on the pavement outside the venue of an Olympic news conference in central London, March 30, 2012. The International Olympic Committee Coordination Commission were visiting London for the final time before the London 2012 Games to be given an update on the progress of London's delivery of staging the Olympic Games. REUTERS/Toby Melville (BRITAIN - Tags: SPORT OLYMPICS CIVIL UNREST) 

Meredith Alexander, former member of the Commission for a Sustainable London 2012, speaks to a reporter at the headquarters of Amnesty International in London January 25, 2012. Alexander has resigned in protest over a sponsorship deal with Dow Chemical because of the American company's ties to the Bhopal gas disaster that killed thousands in India in 1984. The Games' organisers chose Dow to make the hundreds of plastic panels that will decorate the outside of the main stadium in a contract that has angered many Indians, including current and former Olympic athletes. Picture taken January 25, 2012. REUTERS/Chris Helgren (BRITAIN - Tags: POLITICS SPORT OLYMPICS DISASTER BUSINESS) 

Meredith Alexander, former member of the Commission for a Sustainable London 2012, speaks to a reporter at the headquarters of Amnesty International in London January 25, 2012. Alexander has resigned in protest over a sponsorship deal with Dow Chemical because of the company's ties to the Bhopal gas disaster that killed thousands in India in 1984. The Games' organisers chose Dow to make the hundreds of plastic panels that will decorate the outside of the main stadium in a contract that has angered many Indians, including current and former Olympic athletes. Picture taken January 25, 2012. REUTERS/Chris Helgren (BRITAIN - Tags: POLITICS SPORT OLYMPICS DISASTER) 

Meredith Alexander, former member of the Commission for a Sustainable London 2012, speaks to a reporter at the headquarters of Amnesty International in London January 25, 2012. Alexander has resigned in protest over a sponsorship deal with Dow Chemical because of the company's ties to the Bhopal gas disaster that killed thousands in India in 1984. The Games' organisers chose Dow to make the hundreds of plastic panels that will decorate the outside of the main stadium in a contract that has angered many Indians, including current and former Olympic athletes. Picture taken January 25, 2012. REUTERS/Chris Helgren (BRITAIN - Tags: POLITICS SPORT OLYMPICS DISASTER BUSINESS) 

Meredith Alexander, former member of the Commission for a Sustainable London 2012, speaks to a reporter at the headquarters of Amnesty International in London January 25, 2012. Alexander has resigned in protest over a sponsorship deal with Dow Chemical because of the company's ties to the Bhopal gas disaster that killed thousands in India in 1984. The Games' organisers chose Dow to make the hundreds of plastic panels that will decorate the outside of the main stadium in a contract that has angered many Indians, including current and former Olympic athletes. Picture taken January 25, 2012. REUTERS/Chris Helgren (BRITAIN - Tags: POLITICS SPORT OLYMPICS DISASTER BUSINESS) 

Children of the victims of 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, celebrate during a protest after getting their memorandum signed by the prime minister's office (PMO) in New Delhi June 27, 2011. Dozens of children on Monday protested outside PMO demanding medical care, rehabilitation and poison free environment in Bhopal, a media release said. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENVIRONMENT) 

Children of the victims of 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, celebrate during a protest after getting their memorandum signed by the prime minister's office (PMO) in New Delhi June 27, 2011. Dozens of children on Monday protested outside PMO demanding medical care, rehabilitation and poison free environment in Bhopal, a media release said. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENVIRONMENT) 

Children of the victims of 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, wear bands as they attend a protest outside prime minister's office (PMO) in New Delhi June 27, 2011. Dozens of children from central Indian city of Bhopal on Monday protested outside PMO demanding medical care, rehabilitation and poison free environment, a media release said. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENVIRONMENT) 

Children of the victims of 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, stand in a queue after being stopped by the police from marching towards prime minister's office (PMO) during a protest in New Delhi June 27, 2011. Dozens of children from central Indian city of Bhopal on Monday protested outside PMO demanding medical care, rehabilitation and poison free environment, a media release said. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENVIRONMENT) 

India's central bank governor Duvvuri Subbarao smiles during a news conference in the central Indian city of Bhopal February 10, 2011. India's government should adopt a plan of fiscal consolidation in the coming financial year to April 2012 and beyond, Subbarao said on Thursday. REUTERS/Raj Patidar (INDIA - Tags: BUSINESS POLITICS HEADSHOT) 

Bhopal gas tragedy victims attend a protest organised by non-governmental organisation (NGO) 'Bhopal Group for Information and Action' in New Delhi November 8, 2010. Hundreds of victims on Monday demanded that U.S. President Barack Obama ensure U.S. chemical firm Union Carbide and its parent company Dow Chemical's accountability for the industrial catastrophe that took place in Bhopal in 1984. 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/Adnan Abidi (INDIA - Tags: CIVIL UNREST POLITICS ENVIRONMENT BUSINESS) 

A Bhopal gas tragedy victim attends a protest organised by non-governmental organisation (NGO) 'Bhopal Group for Information and Action' in New Delhi November 8, 2010. Hundreds of victims on Monday demanded that U.S. President Barack Obama ensure U.S. chemical firm Union Carbide and its parent company Dow Chemical's accountability for the industrial catastrophe that took place in Bhopal in 1984. 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/Adnan Abidi (INDIA - Tags: CIVIL UNREST POLITICS ENVIRONMENT BUSINESS IMAGES OF THE DAY) 

A Bhopal gas tragedy victim attends a protest organised by non-governmental organisation (NGO) 'Bhopal Group for Information and Action' in New Delhi November 8, 2010. Hundreds of victims on Monday demanded that U.S. President Barack Obama ensure U.S. chemical firm Union Carbide and its parent company Dow Chemical's accountability for the industrial catastrophe that took place in Bhopal in 1984. 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/Adnan Abidi (INDIA - Tags: CIVIL UNREST POLITICS ENVIRONMENT BUSINESS) 

Indian police personnel stand guard in front of a bill board during the country's Independence Day celebrations at a parade ground in the central Indian city of Bhopal August 15, 2010. REUTERS/Raj Patidar (INDIA - Tags: ANNIVERSARY MILITARY SOCIETY) 

Police detain a victim of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, during a protest in New Delhi August 2, 2010. Police detained hundreds of victims at a protest after they crossed the given deadline to leave the protest spot, a police official said. The protesters demanded the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals. REUTERS/Adnan Abidi (INDIA - Tags: DISASTER CIVIL UNREST POLITICS) 

Police detain victims of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, during a protest in New Delhi August 2, 2010. Police detained hundreds of victims at a protest after they crossed the given deadline to leave the protest spot, a police official said. The protesters demanded the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals. REUTERS/Adnan Abidi (INDIA - Tags: DISASTER CIVIL UNREST POLITICS) 

Police detain a victim of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, during a protest in New Delhi August 2, 2010. Police detained hundreds of victims at a protest after they crossed the given deadline to leave the protest spot, a police official said. The protesters demanded the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals. REUTERS/Adnan Abidi (INDIA - Tags: DISASTER CIVIL UNREST POLITICS) 

Children of the victims of 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, look out from a police bus after being detained at a protest in New Delhi August 2, 2010. Police detained hundreds of victims at a protest after they crossed the given deadline to leave the protest spot, a police official said. The protesters demanded the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals. REUTERS/Adnan Abidi (INDIA - Tags: DISASTER CIVIL UNREST POLITICS) 

Police detain a victim of the 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, during a protest in New Delhi August 2, 2010. Police detained hundreds of victims at a protest after they crossed the given deadline to leave the protest spot, a police official said. The protesters demanded the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals. REUTERS/Adnan Abidi (INDIA - Tags: DISASTER CIVIL UNREST POLITICS) 

Victims of the 1984 Bhopal gas tragedy, whereby a gas leak from a Union Carbide pesticide plant killed at least 3,500 people, attend a demonstration in New Delhi July 26, 2010. Hundreds of survivors of the accident took part in the protest on Monday demanding that the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals, according to non-governmental organisations (NGO) "Bhopal Group for Information and Action" and "Children against Dow-Carbide". REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENERGY BUSINESS) 

Victims of the 1984 Bhopal gas tragedy, whereby a gas leak from a Union Carbide pesticide plant killed at least 3,500 people, attend a demonstration in New Delhi July 26, 2010. Hundreds of survivors of the accident took part in the protest on Monday demanding that the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals, according to non-governmental organisations (NGO) "Bhopal Group for Information and Action" and "Children against Dow-Carbide". REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENERGY BUSINESS) 

A victim of the 1984 Bhopal gas tragedy, whereby a gas leak from a Union Carbide pesticide plant killed at least 3,500 people, holds a placard during a demonstration in New Delhi July 26, 2010. Hundreds of survivors of the accident took part in the protest on Monday demanding that the government revisit its recent decisions on issues of compensation, rehabilitation of victims and take legal action against U.S. chemical firm Union Carbide and its parent company Dow Chemicals, according to non-governmental organisations (NGO) "Bhopal Group for Information and Action" and "Children against Dow-Carbide". REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENERGY) 

Activists of India's main opposition Bharatiya Janata Party (BJP) shout slogans and hold posters of India's Prime Minister Manmohan Singh (C), Chief of India's ruling Congress party Sonia Gandhi (R) and India's Oil Minister Murli Deora during a protest against the hike in fuel prices, in a lake in the central Indian city of Bhopal June 30, 2010. REUTERS/Raj Patidar (INDIA - Tags: CIVIL UNREST POLITICS ENERGY BUSINESS) 

Victims of Bhopal gas disaster hold posters during a demonstration in New Delhi June 24, 2010. A ministerial panel called on the government on Monday to examine if Dow Chemical was liable in the world's most deadly industrial accident and sought the extradition of a U.S.-based ex-chairman of Union Carbide. Former chairman of Union Carbide Corporation Warren Anderson has been classified as an absconder in the case by the Bhopal court. REUTERS/Mukesh Gupta (INDIA - Tags: CIVIL UNREST SOCIETY) 

A victim of Bhopal gas disaster shouts slogans during a demonstration in New Delhi June 24, 2010. A ministerial panel called on the government on Monday to examine if Dow Chemical was liable in the world's most deadly industrial accident and sought the extradition of a U.S.-based ex-chairman of Union Carbide. REUTERS/Mukesh Gupta (INDIA - Tags: CIVIL UNREST SOCIETY) 

A child wearing a mask holds a banner in front of a burring mock pyre during a protest organised by Sadhbavana Adhikar Manch, a Non-Governmental Organisation, against the Bhopal gas disaster verdict in the central Indian city of Bhopal June 15, 2010. An Indian court last week 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: DISASTER POLITICS CIVIL UNREST) 

Children wearing masks sit near a mock body during a protest organised by Sadhbavana Adhikar Manch, a Non-Governmental Organisation, against the Bhopal gas disaster verdict in the central Indian city of Bhopal June 15, 2010. An Indian court last week 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: DISASTER POLITICS CIVIL UNREST) 

An activist from Sadhbavana Adhikar Manch, a Non-Governmental Organisation, wearing a mask holds a banner during a protest against the Bhopal gas disaster verdict in the central Indian city of Bhopal June 15, 2010. An Indian court last week 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: DISASTER POLITICS CIVIL UNREST)