About: http://webisa.webdatacommons.org/217542471

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	Oxygen, argon, water vapor and other trace gases make up the rest.is not 500 ppm only 5/100th of 1%?
http://www.w3.org/ns/prov#wasQuotedFrom	freerepublic.com