1. A naturally occurring mineral fiber that is heat-resistant and was formerly used in insulation, roofing, and other building materials.
Usage: Now recognized as a serious health hazard; inhalation can cause lung disease and cancer.

Examples

• Asbestos was widely used in construction materials throughout the 20th century.
• Many older buildings contain asbestos insulation that poses a health risk.
• The company was sued for exposing workers to asbestos without proper safety equipment.
• Asbestos removal requires specialized training and protective gear.
• Health officials warned residents about asbestos contamination in the old school building.