1 5 0 http://purl.obolibrary.org/obo/ENVO_00010505 aerosol 'aerosol' SubClassOf 'environmental material' 'aerosol' SubClassOf http://purl.obolibrary.org/obo/ENVO_01000060 http://purl.obolibrary.org/obo/ENVO_01000415 fine respirable suspended particulate matter 'fine respirable suspended particulate matter' SubClassOf 'respirable suspended particulate matter' http://purl.obolibrary.org/obo/ENVO_01000416 ultrafine respirable suspended particulate matter 'ultrafine respirable suspended particulate matter' SubClassOf 'fine respirable suspended particulate matter' http://purl.obolibrary.org/obo/ENVO_01000063 planktonic material 'planktonic material' SubClassOf 'organic material' http://purl.obolibrary.org/obo/ENVO_01000060 particulate matter 'particulate matter' SubClassOf 'environmental material' http://purl.obolibrary.org/obo/ENVO_01000405 respirable suspended particulate matter 'respirable suspended particulate matter' SubClassOf 'aerosol'