A display case at NIOSH shows a normal lung and a diseased black lung, caused by inhaling coal dust and other harmful particles while coal mining.
A display case at NIOSH shows a normal lung and a diseased black lung, caused by inhaling coal dust and other harmful particles while coal mining. Howard Berkes NPR
A display case at NIOSH shows a normal lung and a diseased black lung, caused by inhaling coal dust and other harmful particles while coal mining. Howard Berkes NPR