Asbestos is a group of similar minerals the distinguishing characteristic of separable, long, thin fibers. These fibers are too small to be seen without the aid of a microscope and are only dangerous if they are disturbed, causing the fibers to float in the air where they are easily inhaled. Scientists have recognized asbestos as a health threat to humans because these fibers can be inhaled and cause cancer and other pulmonary diseases. These fibers are very difficult to remove from the lungs and the time lag between inhalation and any adverse health manifestations can be as long as 30 or more years.

Learn more about asbestos, its effect on public health and the efforts of ATSDR to respond to this hazard.