About: http://webisa.webdatacommons.org/427988475

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	Scientists have observed heat-trapping greenhouse gases in the atmosphere, particularly carbon dioxide and methane, at levels that far surpass those seen in the last 650,000 years, Overpeck said.
http://www.w3.org/ns/prov#wasQuotedFrom	arizona.edu