Older commercial industrial buildings and private dwellings may contain a variety of asbestos products, such as asbestos-cement sheeting in walls and ceilings, or roof cladding made from corrugated asbestos-cement. Asbestos may be found in structures built as late as the mid- to late 1980s.

Asbestos Related Occupations
Asbestos has been used in association with a number of occupations such as the US military and armed forces, particularly the Navy. Massive amounts of asbestos were used in shipbuilding and commercial construction prior to the mid-1970's.

Other workers in occupations which have been associated with asbestos use are:

Insulators, Pipe Fitters, Plumbers, Electricians, Painters, Crane Operators, Floor Coverers, Pot Tenders, Welders, Paper Mill Workers, Custodians, Steam Fitters, Tile Setters, Aerospace Workers, Mechanics, Building Engineers, Demolition Crews, Former US Navy Personnel, Packing/Gasket Manufacturing Workers, Protective Clothing Manufacturing, Rubber Workers, Warehouse Workers, Home Improvement, Hospitals, Schools, Loading Docks, Glass Factory Workers, Building Inspectors, Bulldozer Operators, Manufacturing Workers, Excavating machine operators, Heavy Equipment Mechanics, Job and Die setters, Contractors, Building Managers, Mixing Operatives, Laborers, Sawyers, Teachers, Tinsmiths, Weavers, Excavators, Technicians

Risks of Asbestos Exposure
Humans come into contact with asbestos when they swallow or inhale the fibers. These particles can then become embedded in the tissues of the respiratory or digestive systems.

Three Main Diseases Caused by Asbestos Exposure

Asbestosis
Asbestosis causes widespread scar tissue between the alveoli, or spread over the lung. It is difficult to distinguish from other causes of interstitial fibrosis. Only confirmation of exposure to asbestos or detection of unusually high numbers of asbestos fibers in the lung is considered conclusive evidence of this disease.

Mesothelioma
Mesothelioma is a tumor of the chest lining, abdominal lining and occasionally the heart lining. Asbestos is not the only cause of this disease, but it is the most important cause in modern times. Crocidolite is the most important asbestos-related factor, but amosite, chrysotile and tremolite are also linked. This disease takes 20-50 years to appear, with the highest risk around 30-35 years after exposure. It is typically dose-related, but in rare cases has been known to occur in patients with little known occupational exposure to asbestos.

Lung Cancer
Lung cancer is relatively common among the general public and is the cancer most frequently associated with asbestos. Tumors grow and eventually obstruct airways. No characteristics specify a lung cancer as being caused by asbestos; we cannot distinguish a 'cigarette' lung cancer from an 'asbestos' lung cancer or 'another' lung cancer. Smoking increases the risk of death due to lung cancer for asbestos workers.

The history of asbestos and how it is has endangered human mortality has plagued different societies since ancient times. Throughout history must of these warnings have been ignored. Today, the use of asbestos is banned in the US and many other countries. This ban applies to manufacture, supply, storage, sale, use, reuse, installation and replacement of asbestos, except in special circumstances (e.g. removal and disposal of asbestos, and research work).

Dave Casey, 08 May 2010

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