"Dow was not the owner of Union Carbide at the time, so this is a different company and a different business," Cameron has told the Indian broadcaster CNN-IBN.
Emails and telephones messages by The Associated Press seeking comment from Dow representatives in India and the US weren't answered.
The IOC's perceived insensitivity angers the Bhopal victims and those who have dedicated their lives to helping them, like Satinath Sarangi, director of the Sambhavna Trust Clinic, which offers free health care for those exposed to gas or polluted water.
"For Dow the Olympics are like the Ganga in which it will dip and wash away its crime," said Sarangi, referring to the ritual cleansing devout Hindus take in the sacred Ganges river.
But here, memories of running from the gas, watching bodies of friends, family and neighbors pile up on the narrow winding streets and in overwhelmed hospital wards can't be washed away.
"I can never forget that night as long as I live," says Balkrishan Namdev, a 55-year-old survivor and activist.
He remembers waking up feeling like he couldn't breathe. Like someone was burning chili peppers. Then there was just mad panic.
"Even the leaves of the trees turned black."
Those who suffered were already bitterly poor, most of them unskilled migrant laborers from rural areas. Most of the survivors of the gas leak lost the only skill they could barter for money — their ability to do hard labor.
Their poverty and political weakness left them vulnerable to the conditions that led to the world's worst industrial accident, and forced them to take compensation so low that it wouldn't even pay for a year's medicine for some survivors, Sarangi said.
Even today it's impossible to walk past a dozen homes in the slums that circle the compound of the old pesticide factory without finding a child with disabilities.
Dozens of parents bring their children for physical and speech therapy to a special school and clinic run by the Chingari Trust, a nonprofit organization run by two survivors.
Here, a 4-year-old girl is gently coaxed to put one skinny leg ahead of the other on a wooden beam on the floor. She can walk but has serious behavioral and sensory problems, her therapist says. Crowds send her into a panic. She suddenly falls down. She has problems sleeping and staying asleep.
Three-year-old Mohammed Imran Ali lies on a stretcher as his thin, twisted limbs are gently exercised. Other children with wasted limbs and vacant eyes smile and stare at visitors.
To spend even a few hours at Chingari, the word means "spark" in Hindi, is to know that long years after the fumes dissipated, the scars it left on Bhopal's minds and bodies are far from healed.
Targeting Dow's Olympic sponsorship, they feel, might be their last best hope to get justice.
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