How hazardous are low concentrations of inhaled particles?
D000397:Air Pollution; D001195:Asbestosis / Q000209:etiology; D004781:Environmental Exposure; D006801:Humans; D008171:Lung Diseases / Q000209:etiology*; D008452:Maximum Allowable Concentration; D009784:Occupational Diseases / Q000209:etiology*; D009787:Occupational Medicine; D013997:Time Factors; D014505:Urban Population