About: http://webisa.webdatacommons.org/271908490

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	The dangers of industrial pollution were recognized only in recent decades when studies revealed the threats posed by PCBs, mercury and other chemicals.
http://www.w3.org/ns/prov#wasQuotedFrom	nwf.org