Asbestos is a naturally occurring mineral that was widely used in the construction industry because of its strength, durability, and heat resistance. It was commonly used in building materials such as insulation, roofing, ceiling tiles, flooring, and pipes. However, it was later discovered that asbestos fibers are extremely hazardous to health when inhaled, and can cause a range of serious illnesses, including asbestosis, lung cancer, and mesothelioma.