About: http://webisa.webdatacommons.org/443239089

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	Carbon dioxide, hydrogen sulfide, nitrogen, and other gases may be present in relatively low concentrations.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com