About: http://webisa.webdatacommons.org/134715011

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 single biggest factor in rapid climate change is the ???greenhouse effect.??? Greenhouse gases, such as carbon dioxide, methane, nitrous oxide, and chlorofluorocarbons are all produced in large amounts by human activity.
http://www.w3.org/ns/prov#wasQuotedFrom	state.gov