Asbestos is a mineral fiber that was commonly used as insulation and as a fire retardant in building materials. Inhalation of asbestos fibers can cause serious illnesses like cancer and asbestosis. The risk of health problems increases with long or high exposure to asbestos fibers. The European Union has banned all uses and extraction of asbestos. Disturbing asbestos-containing materials can cause fibers to become airborne and inhaled, risking health problems. Common sources of asbestos exposure include construction, asbestos product manufacturing, brake and clutch repair work, and deteriorating asbestos-containing building materials.