Asbestos is a set of naturally occurring minerals that were widely used in construction materials from the 1950s to the 1990s. Asbestos is strong, fire-resistant, and an excellent insulating material, making it a popular choice for building products like roofing tiles, ceiling tiles, and insulation. However, asbestos fibers are small and can easily break down and become airborne, where they can be inhaled by humans and cause severe and fatal health problems.