About: http://webisa.webdatacommons.org/45689078

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	Gases, such as nitrogen dioxide, carbon monoxide, sulfur dioxide, and ozone, are particularly harmful pollutant gases, particularly in urban and industrial areas.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com