About: http://webisa.webdatacommons.org/296988034

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 answer is a great deal, once the carbon content of these deposits of former life was unleashed into the atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom	grist.org