About: http://webisa.webdatacommons.org/4817991

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	Busses, trucks, automobiles, airplanes, fireplaces, wood stoves, industrial processes such as metal smelting, steel production and coal powered generation are all significant sources of particulate matter.
http://www.w3.org/ns/prov#wasQuotedFrom	achooallergy.com