Coal dust.
D000818:Animals; D002273:Carcinogens / Q000009:adverse effects*; D003031:Coal / Q000009:adverse effects* / Q000032:analysis; D004391:Dust / Q000009:adverse effects* / Q000032:analysis; D004781:Environmental Exposure; D006801:Humans; D009369:Neoplasms / Q000209:etiology; D009374:Neoplasms, Experimental / Q000209:etiology; D016273:Occupational Exposure
D002273:Carcinogens; D003031:Coal; D004391:Dust