About: http://webisa.webdatacommons.org/242425853

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	Enacted in 1970, the U.S. Clean Air Act was amended in 1990 and implemented in 1994 to regulate emissions, especially from coal-burning power plants.
http://www.w3.org/ns/prov#wasQuotedFrom	eurekalert.org