Though asbestos in now banned in Britain, many buildings we live and work in today predate the ban. For example, about 90% of schools still contain asbestos. As a result, thousands of people are dying, and will continue to die, from asbestos related diseases which very often are not manifest until many years, even decades, after exposure.
Asbestos is a fibrous substance found in seams between layers of rock. The fibres are strong, flexible, and will not burn below 1000 ºC. There are different types but these days 95% of all asbestos mined is white asbestos, or Chrysotile.