About: http://webisa.webdatacommons.org/368155732

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	These include polycyclic aromatic hydrocarbons, dioxins and furans, which are produced through combustion like wood burning, as well as heavy metals, such as arsenic, lead and mercury.
http://www.w3.org/ns/prov#wasQuotedFrom	ec.gc.ca