 Asbestos is an excellent electrical insulator and is highly heat-resistant, so for many years it was used as a building material.Bureau of Naval Personnel, Basic Electricity. 1969: US Navy. However, it is now a notorious health and safety hazard and the use of asbestos as a building material is illegal in many countries.
<coherence>  Asbestos is an excellent electrical insulator and is highly heat-resistant, so for many years it was used as a building material.Bureau of Naval Personnel, Basic Electricity. 1969: US Navy. However, it is now a notorious health and safety hazard and the use of asbestos as a building material is illegal in many countries.