About: http://webisa.webdatacommons.org/137524474

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Further, few studies have compared the toxicity of PM collected from significant sources including dust from roads, agricultural fields, mining activities, construction sites or other significant sources of coarse thoracic PM.
http://www.w3.org/ns/prov#wasQuotedFrom	epa.gov