Asbestos is a natural fibrous mineral that was widely used in manufacturing and construction in the past. It was commonly used for insulation, roofing, flooring, and other products. However, it was later discovered that asbestos poses severe health risks for those who come into contact with it. Inhaling asbestos fibers can cause serious lung diseases such as mesothelioma and lung cancer, making it a hazardous substance that must be disposed of safely.