About: http://webisa.webdatacommons.org/250948041

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	Such conditions, where CO2 concentrations build to toxic levels but also where they displace oxygen, also represent the only proven way that carbon dioxide vapors are a threat to humans.
http://www.w3.org/ns/prov#wasQuotedFrom	wattsupwiththat.com