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Bhopal – Still a Nightmare 40 years Later

By Stephen Lester.

Excerpted from Bhopal: 40 Years of Injustice, an update and report by Amnesty International

Yesterday marked the 40th anniversary of the Bhopal Gas Tragedy, often considered the world’s worst chemical industrial disaster. Shortly before midnight on December 2, 1984, tons of the deadly chemical methyl isocyanate (MIC), along with other chemicals, began to leak from storage tanks on the property of the U.S. multinational corporation Union Carbide Corporation located on the outskirts of Bhopal in central India. Over the course of that night, more than 27 tons of this and other gases were released into the surrounding neighborhood exposing thousands of people.

According to Amnesty International, more than 570,000 people were exposed to the toxic cloud that night and more than 22,000 people have died, 10,000 within the first 3 days. Those who survived developed a wide range of adverse health problems including respiratory ailments, eye disease, immune system impairment, neurological and neuromuscular damage, cancers, gynecological disorders and mental health problems, as well as miscarriages and birth defects.

The gas leak pushed already impoverished communities into further destitution. In many families, the main wage earner died or became too ill to work. Women and children suffered disproportionately. Over the years that followed, the health effects of gas exposure began to be seen in subsequent generations, with research showing a large number of children born of gas-exposed parents suffered from growth retardation, birth defects and other medical conditions.

Making matters worse, thousands of tons of toxic waste remain buried in and around the abandoned plant to this day. Studies by many organizations over the years have shown ongoing pollution around the plant site, including contamination of soil and groundwater with heavy metals. This in turn has contaminated residents’ drinking water and harmed their health, adding to the already dismal health status of gas-exposed residents.

According to Amnesty International, the catastrophic gas leak was the foreseeable result of innumerable corporate failures, but Union Carbide’s response to the disaster was woefully inadequate and callous. Despite the fact that thousands of people were dying from gas exposure, or suffering agonizing injuries, the company withheld critical information regarding MIC’s toxicological properties, undermining the effectiveness of the medical response.

To this day, Union Carbide has failed to name any of the chemicals and reaction products that leaked along with MIC on that fateful night in December 1984. The Indian government has offered free health care to gas-exposed people in government hospitals ever since the gas leak, but standards of care have been grossly inadequate, forcing many patients to pay for private treatment and medicine.

In September 1986, the Indian government filed a claim against Union Carbide seeking $3.3 billion. In 1989, without consulting Bhopal survivors, the parties reached an out-of-court settlement for $470 million. This amount was less than 15% of the initial amount sought by the government, and far less than most estimates of the damage at the time. The mechanism put in place to distribute the money was also highly inadequate. Thousands of claims were never registered and people received only $350, a paltry amount that was quickly spent on medical bills.

This year, a group of survivors of the Bhopal tragedy toured the United States to help ensure that no other community suffers another major chemical disaster and to push the U.S. Congress to declare December 3rd as National Chemical Disaster Awareness Day. They are also asking the US Department of Justice to serve the Indian government’s summons to Dow Chemical (who purchased Union Carbide in 1999) to appear in court which they have refused to do despite repeated efforts by the Indian government. Read about the 74 organizations that signed on in support of this effort here.

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Toxic Tuesdays

Cumulative Risks and Toxicity

Toxic Tuesdays

CHEJ highlights several toxic chemicals and the communities fighting to keep their citizens safe from harm.

Cumulative Risk and Toxicity

Evaluating the cumulative impacts of exposure to multiple chemicals is perhaps the most difficult task facing toxicologists. The standard approach is to evaluate these risks by conducting a risk assessment or risk evaluation which relies heavily on data from exposure to a single chemical. But this only provides a limited assessment of the risks. Over the years there has been a growing recognition that this approach has many flaws (see previous issues of Toxic Tuesday) and limited application to real world exposures to multiple chemicals at low concentrations. EPA has recognized the need to develop tools to evaluate cumulative risks, but has failed to develop a clear road map for how to do this.

A cumulative risk assessment would analyze the combined risks to health or the environment from exposure to multiple agents or stressors (USEPA 2003). This process includes evaluating the risks posed by exposure to multiple toxic chemicals simultaneously and over time as well as the influence on health of stressors such as genetics, lifestyle choices, income and air quality.

Evaluating cumulative risks requires knowledge of what chemicals a person was exposed to, the concentration of each of the substances in the mixture and how long a person was exposed to each of these substances. It also requires knowledge of how these chemicals in combination react to each other and how these chemical interactions in mixtures potentially impact human health. It also necessitates knowledge about the health status of each person exposed. There is both a natural variability as well as unique susceptibility among a group of people that influences health outcomes. For example, people who are sick or who have existing health conditions such as a weak heart or compromised immune system can influence how a person responds to a mixture of chemicals. Socioeconomic factors such as poverty, unemployment rates, education levels and income also influences how people in a community respond. All of these factors combined would have to be considered to assess the cumulative health impact resulting from exposure to multiple chemicals simultaneously.

What’s become very clear over the years is that the scientific community knows very little about most of these factors. Consequently, risk assessors need to make many assumptions about information that is not known or at best uncertain. This is especially true when it comes to information about exposures (concentration and for how long) as well what level of exposure actually triggers harm in the body. The lack of knowledge and understanding of the molecular interactions have made it very difficult for scientists to forecast what will happen when people are exposed to multiple chemicals at low concentrations over time and why the field of toxicology has struggled to address multiple chemical exposures.

This failure has left community leaders and people in communities exposed to multiple chemicals simultaneously frustrated by the lack of answers and the lack for action by government agencies when addressing multiple chemical exposures. It may also be frustrating for government agencies because they are dependent on a tool (risk assessment) that relies on an antiquated approach that cannot answer the questions that people are asking.

EPA and other public health agencies need to be honest and truthful with the public about what they don’t know about chemical exposure risks. Scientists actually don’t know very much about what happens to people exposed to low level mixtures of toxic chemicals. While this reality may not be reassuring, the truth allows everyone to better understand what they are facing.

There is an alternative that should be considered. EPA should follow the lead of what the government did to take care of Vietnam Veterans who were exposed to Agent Orange and the soldiers exposed to emissions from the burn pits in Iraq and Afghanistan, among others. In these cases, soldiers do not have to prove that their illnesses were caused by their exposure to toxic chemicals. If they can show that they were exposed and that they have an illness associated with the chemicals they were exposed to, that’s sufficient for them to get health care and other compensation.

Communities exposed to toxic chemical mixtures shouldn’t be held to a different standard given that the uncertainties about toxic exposures are driven by the same scientific unknowns. In the absence of a basic understanding of what adverse health effects might result from exposures to the mixtures of toxic chemicals released into a community, the government should take steps to address the needs of the community, whether it’s by providing health care for those who were exposed or establishing a medical monitoring program to follow these people, or both.

These steps will begin the long and difficult process of acknowledging what we know and don’t know about exposes to low level mixtures of toxic chemicals and begin to learn what happens to the people exposed in these situations.

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