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What is Asbestos?

For most individuals, especially those born in the last 40 years, the mention of asbestos conjures up thoughts of a dangerous substance that's sickened many people and caused myriad deaths around the world. That's an accurate description.

A common misconception on the part of many individuals, however, is that asbestos is a hazardous man-made substance, conjured up in factories around the world for commercial use. The truth is, however, that asbestos is a naturally-occurring mineral that can be found in hundreds of countries on just about every continent. As a matter of fact, asbestos is still mined in several of these countries, including Canada and Russia. Other countries have outlawed the mining of asbestos.

Asbestos is a highly-fibrous mineral with long, thin, separable fibers. The thin fibers can be spun and woven together, and possess valuable heat-resistant properties that make asbestos suitable for insulation and other such products. Indeed, for decades, asbestos was the material of choice for many industries that were manufacturing products for which heat resistance, low electrical conductivity, flexibility, and high tensile strength were essential factors. Today, there are other alternatives.

There are two kinds of asbestos. The serpentine variety is curly. Chrysotile asbestos, most commonly used for industrial purposes, is from the serpentine family. Other asbestos fibers, from the amphibole family, are very straight and needle-like. Amosite, crocidolite, tremolite, actinolite, and anthophyllite are amphibole asbestos varieties.

Currently, chrysotile asbestos is the only type mined on a wide-scale though a handful of countries continue to mine other forms. However, worldwide outrage about the use of dangerous asbestos has forced many countries to reconsider their position on mining.

Why is Asbestos a Health Concern?
Studies estimate that approximately 3,000 different types of commercial products include asbestos. In and of itself, the mineral is not harmful, as long as it's intact. However, when the asbestos in these products is damaged and the fibers become airborne, concerns begin to arise.

"Friable" asbestos - that which is dry and can be easily crumbled with the hand - is the culprit. Such asbestos is more likely to release fibers into the air. Spray-applied asbestos fireproofing, which was used in millions of buildings throughout the world, is of the friable variety. However, some non-friable asbestos can also release airborne fibers, particularly when sanded, chopped, hammered, cut, or otherwise manipulated. That's why, when demolishing a building that contains asbestos, proper removal is essential before the building is torn down.

Why are Airborne Fibers Dangerous?
Inhaled asbestos fibers remain in the body and cannot be expelled. Because of this, the fibers can easily penetrate body tissues and may deposit themselves in airways and in the lung tissue. The more you're exposed, the more likely you might develop an asbestos-related disease. Most people exposed to asbestos on a very casual basis probably will not develop such a disease.

Once the fibers are lodged in the body, they will cause inflammation which may eventually result in the formation of cancerous tumors, particularly on the mesothelium - the lining of the lungs. Other affected areas may include the peritoneum - the lining of the abdomen - and the pericardium - the lining around the heart. There are various type of mesothelioma treatments for each type.

With some recent exceptions found in workers at the World Trade Center disaster, asbestos-related diseases, such as pleural mesothelioma, usually take decades to surface. That's why current cases of mesothelioma and other asbestos-related diseases involve many individuals who were employed in shipyards during World War II, performing jobs that exposed them to friable asbestos on a daily basis. Shipyard workers are among those most affected by aggressive mesothelioma.

Is Asbestos Banned?
Contrary to what many people believe, asbestos is not and has never been banned in the United States. In 1976, Congress passed a law to regulate toxic substances (known as the Toxic Substances Control Act) but a total ban was not suggested. In 1989, the Environmental Protection Agency finalized regulations to ban asbestos under the aforementioned act, but two years later, a New Orleans circuit court of appeal overturned the regulation. The result was that new uses of the dangerous mineral were banned but old ones remained.

Many other industrialized nations have banned asbestos including the European Union and a handful of other countries, such as Chile, Croatia, Australia, Argentina, and Saudi Arabia. Several countries, especially those who continue to make money from the mining of asbestos, consistently fight against asbestos bans.

A few current U.S. senators, with the assistance of asbestos watchdog groups, hope to encourage the government to reconsider a ban on all asbestos products. A new bill, called the "Ban Asbestos in America Act of 2007" (S.742), was introduced by Senator Patty Murray on March 1, 2007.

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Asbestos Exposure: What Every Homeowner Should Know

As a homeowner, you certainly have enough to worry about: between home improvements, the rising cost of energy, and potentially harmful toxins, such as mold, there is no shortage of concerns. You may think that you have covered all of the bases when it comes to the health and safety of your home, but there is another equally pressing issue that affects over 35 million homeowners in the United States – the presence of asbestos within insulation and other structural materials, including floor and ceiling tiles, roofing, drywall and even stucco.

Why is asbestos so dangerous? Asbestos exposure is the only known cause of pleural mesothelioma, a fatal form of cancer that presently does not have a cure. Approximately 2,500 people are diagnosed with mesothelioma (also known as asbestos cancer) on a yearly basis. Mesothelioma is 100% fatal, but it is also 100% avoidable.  

A naturally occurring toxin, asbestos was widely used in the development of various construction materials because of its excellent insulating abilities prior to the 1980s, when asbestos-usage regulations were first put into place by the Environmental Protection Agency. Most generally found in insulation, asbestos is not harmful until it is disturbed or damaged, when tiny asbestos fibers may become airborne, putting individuals at risk for inhalation. If inhaled, asbestos fibers (which have a claw-like structure) can cling to the pleural lining of the lungs for decades before an individual may begin to suffer from common mesothelioma symptoms, such as breathing difficulties or a chronic cough.

Because mesothelioma has a latent period of between 20 and 50 years, the average age of newly diagnosed patients is between 50 and 70 years of age. Because mesothelioma is such an aggressive disease, patients will generally lose their battle with mesothelioma in less than 2 years following their diagnosis. There is no cure, but there are various mesothelioma treatment methods available that can improve the patient’s quality of life.

What can homeowners do to protect their family from asbestos? If your home was constructed prior to the 1980s, the chances that it contains asbestos are high. It is advisable to consult with a certified home inspector to determine whether or not there is a need to remove and replace asbestos-containing materials. It is crucial to avoid exposure to asbestos at all costs, but if you must come into contact with asbestos in your home, it is imperative that you wear a mask that covers the nose and mouth, as well as disposable outerwear and booties, to prevent inhalation and transfer of errant fibers.

For additional information related to asbestos exposure and the related health concerns, including mesothelioma, please visit www.maacenter.org.