About: http://webisa.webdatacommons.org/90140206

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	In the 1960s and '70s, control of industrial emissions of smoke and S[O.sub.2] in urban areas was mainly achieved through the construction of large new power stations well outside urban areas.
http://www.w3.org/ns/prov#wasQuotedFrom	questia.com