 Asbestos was widely used during the 20th century until the 1970s when public recognition of the health hazards of asbestos dust led to its prohibition in mainstream  construction and fireproofing in most countries.
<meaning-changed>  Asbestos was widely used during the 20th century until the 1970s when public recognition of the health hazards of asbestos dust led to its prohibition in mainstream  construction and fireproofing in most countries.
 Asbestos was widely used during the 20th century until the 1970s .Bureau of Naval Personnel, Basic Electricity. 1969: US Navy. Many modern buildings constructed before the 1980s are thought to contain asbestos. construction and fireproofing in most countries.