Asbestos is a hazardous substance that was widely used in the UK before it was banned in 1999. Asbestos-based products were used in many homes, buildings, and industries due to their insulation and fire-resistant properties. However, asbestos is now known to cause serious health issues, including lung cancer, mesothelioma, and asbestosis. It is important to safely dispose of asbestos to prevent its harmful effects on human health and the environment.