Asbestos is a naturally occurring mineral that was commonly used in construction materials throughout the 20th century due to its strength, durability, and heat resistance. However, it was discovered that exposure to asbestos fibers can cause serious health conditions, such as lung cancer, mesothelioma, and asbestosis. Asbestos-containing materials that are in good condition and not disturbed pose little risk, but when they are damaged or disturbed, the fibers can become airborne and easily inhaled, leading to potential health risks.