Asbestos is a naturally occurring mineral that was commonly used in construction materials such as insulation, roofing, and flooring. It was popular because of its durability, heat resistance, and insulating properties. However, it was later discovered that exposure to asbestos can cause serious health problems, including lung cancer, mesothelioma, and asbestosis.

Asbestos is hazardous because it releases small fibers into the air when it is disturbed. These fibers can be inhaled and cause damage to the lungs over time. Asbestos is also a hazardous substance under the Control of Asbestos Regulations 2012 and must be handled and disposed of in the correct way.