Asbestos is a naturally occurring fibrous mineral that was once widely used in the construction industry for its insulating and fire-resistant properties. However, in the 1970s, it was discovered that asbestos fibres are highly toxic and can cause a range of serious illnesses, including asbestosis, lung cancer, and mesothelioma. Asbestos can still be found in many buildings constructed before the 1990s, making it important to have an asbestos survey carried out if you are planning any refurbishment or demolition works.