About: http://webisa.webdatacommons.org/5273833

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	So yes, barium is in the air, from such things as burning of coal and oil.
http://www.w3.org/ns/prov#wasQuotedFrom	contrailscience.com