Asbestos is a naturally occurring mineral that was widely used in building construction throughout the 20th century. It was prized for its strength, durability, and fire-resistant properties. However, it is now known that exposure to asbestos can cause serious health problems, including lung cancer and mesothelioma.

Asbestos is found in many different products, including insulation, ceiling tiles, roofing materials, and flooring. It is often found in older buildings, particularly those constructed before the 1980s.