20th century to present Mining continued through the 20th century. By the late 20th century, environmental hazards were better understood, but many of the miners contracted asbestosis and other diseases of the lungs from their work.
20th century to present Mining continued through the 20th century. By the late 20th century, environmental hazards were better understood, but many of the miners contracted asbestosis and other diseases of the lungs from their work.