Asbestos is a naturally occurring mineral that was heavily used in construction materials throughout the 20th century. Its fire-resistant properties and durability made it a popular choice for a variety of applications, from insulation to ceiling tiles to piping. Unfortunately, asbestos has been linked to a number of serious health conditions, including mesothelioma, lung cancer, and asbestosis. Asbestos exposure can occur when asbestos-containing materials are disturbed, releasing microscopic asbestos fibers into the air.