Asbestos is a naturally occurring mineral that has long been used for building materials, insulation, and other products. However, it has been linked to deadly diseases such as mesothelioma, lung cancer, and asbestosis. In general, asbestos is not dangerous when it is intact and not disturbed. The danger comes when asbestos fibers are released into the air and inhaled. This is why it is critical to dispose of asbestos in a safe and proper manner.