Asbestos is a naturally occurring mineral that was widely used in building materials and other products throughout the 20th century. Its durability, heat resistance, and insulating properties made it a popular choice for everything from roof tiles and floor tiles to pipes, insulation, and even clothing. Unfortunately, we now know that asbestos fibers can be incredibly dangerous if they are inhaled or ingested, causing serious and often fatal health problems such as lung cancer, mesothelioma, and asbestosis.