About: http://webisa.webdatacommons.org/413337676

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	If the CO2 rose due to massive volcanic activity, chances are there was also a large rise in methane, sulphur compounds, such as hydrogen sulphide (extremely toxic), and sulphuric acid / acid rain.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com