pneumonoconiosis การใช้

• Coal workers'pneumonoconiosis ( black lung disease ) was one of Kerr's major concerns from the beginning of his employment by the UMWA and it became his primary responsibility after his appointment as director of the Department of Occupational Health.
• Their efforts led to passage of the Federal Coal Mine Health and Safety Act of 1969, which created a black lung compensation program for coal miners, and its amendment in 1972, that extended benefits to all miners with fifteen or more years of service who suffered respiratory impairment, whether pneumonoconiosis was pathologically verifiable or not.