Asbestos is a mineral that was commonly used for insulation, fireproofing, and soundproofing in older buildings. The material itself is not dangerous, but when it is disturbed or damaged, it releases microscopic asbestos fibers that can be inhaled into the lungs.

When these fibers accumulate, they can cause several health complications, including asbestosis, lung cancer, and mesothelioma. These illnesses have a long latency period, sometimes taking 20 to 50 years to develop, so it's best to remove asbestos if it's found in your building.