About: http://webisa.webdatacommons.org/318647801

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	Outdoor air pollutants come from emissions from vehicles, factory chimneys, burning of fossil fuels such as coal, chemical manufacturing, forest fires, and other sources.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov