About: http://webisa.webdatacommons.org/84695904

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	In addition to emissions from natural wetlands and many other natural sources, human activities including agriculture and the mining and use of fossil fuels produce large amounts of the gas.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org