About: http://webisa.webdatacommons.org/200746018

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	While mercury occurs naturally in the environment, it also is discharged by coal-fired power plants, paper mills and other industries.
http://www.w3.org/ns/prov#wasQuotedFrom	post-gazette.com