At the turn of the last century, asbestos was considered an ideal material for use in the construction industry. It was known to be an excellent fire retardant, to have high electrical resistivity, and was inexpensive and easy to use.The problem with asbestos arises when the fibers become airborne and are inhaled. Because of the size of the fibers, the lungs cannot expel them.

They are also sharp and penetrate tissues.Health problems attributed to asbestos include

1. Asbestosis - A lung disease first found in naval shipyard workers, asbestosis is a scarring of the lung tissue from an acid produced by the body's attempt to dissolve the fibers. The scarring may eventually become so severe that the lungs can no longer function. The latency period ( meaning the time it takes for the disease to develop) is often 10-20 years.

2. Mesothelioma - A cancer of the mesothelial lining of the lungs and the chest cavity, the peritoneum (abdominal cavity) or the pericardium (a sac surrounding the heart). Unlike lung cancer, mesothelioma has no association with smoking.The only known cause is from exposure to asbestos or similar fibers. The latency period for mesothelioma may be 20-50 years. The prognosis for mesothelioma is grim, with most patients dying within 12 months of diagnosis.

3. Cancer - Cancer of the lung, gastrointestinal tract, kidney and larynx have been linked to asbestos. The latency period for cancer is often 15-30 years.