About: http://webisa.webdatacommons.org/252424768

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	Though low water levels in the Great Lakes make it necessary, dredging can harm the ecosystem by stirring up contaminanted sediment, exposing chemicals such as arsenic and PCBs.
http://www.w3.org/ns/prov#wasQuotedFrom	greatlakesecho.org