About: http://webisa.webdatacommons.org/412830816

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	Negative ions and ozone are created by nature, and found at their most optimal levels where the air is most pure and healthy.
http://www.w3.org/ns/prov#wasQuotedFrom	hvac-talk.com