About: http://webisa.webdatacommons.org/287008106

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	It occurs naturally in the earth's crust, and human activities such as burning fossil fuels, mining, and manufacturing have spread it throughout the environment, including our homes and workplaces.
http://www.w3.org/ns/prov#wasQuotedFrom	alaska.gov