About: http://webisa.webdatacommons.org/70060974

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	Air pollution was a problem, due to the heavy automobile traffic (in the late 1970s only seven countries in the world had more registered passenger cars than Spain), oil-fired space heating, and heavy industry.
http://www.w3.org/ns/prov#wasQuotedFrom	photius.com