Asbestos is a mineral that was commonly used in building materials in the past due to its insulating and fire-resistant properties. It was widely used in homes, schools, hospitals, and other buildings constructed before the year 2000. Asbestos can be found in various materials, including:

• Insulation (vermiculite, pipe and duct insulation)
• Flooring (vinyl tiles, sheet flooring, and adhesives)
• Ceiling tiles and acoustic wall panels
• Roofing and siding shingles
• Textured paint and patching compounds
• Heating equipment and piping

However, asbestos can be harmful to humans when fibers are released into the air and inhaled. When asbestos fibers are inhaled, they can become lodged in the lungs, leading to serious health problems like mesothelioma, lung cancer, and asbestosis.