<http://webisa.webdatacommons.org/81484144>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wisegeek.org> .
<http://webisa.webdatacommons.org/81484144>	<http://www.w3.org/ns/prov#value>	"Although some natural events, such as volcanoes, can cause some pollution, the majority come from human activities." .
<http://webisa.webdatacommons.org/81484144>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/38767993>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/81484144> .