About: http://webisa.webdatacommons.org/63875755

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	global problems such as global warming, ozone depletion, and acid rain
http://www.w3.org/ns/prov#wasQuotedFrom	thefreelibrary.com