１“现在，并且永远消灭煤肺病”实施计划的提出 在过去的２０年中，经过努力，美国煤矿矿工接触的呼吸性粉尘含量已减少了 ７０％以上。在被调查的矿工中，患煤肺病的矿工死亡人数也下降了三分之二。但对美国煤矿工人来说，煤肺病仍是一个严重的问题。美国煤矿年事故死亡人数 1 “Now and Never Eradicate Coal-lung Disease” Proposed Plan of Implementation The amount of respiratory dust that American coal miners have been exposed to over the last 20 years has been reduced by more than 70%. Among miners surveyed, the number of miners who died of coal-lung disease also dropped by two-thirds. But for coal miners in the United States, coal-lung disease remains a serious problem. The number of annual coal mine accidents in the United States