About: http://webisa.webdatacommons.org/393551343

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	But the rise in concentration at the Mississippi???s mouth suggests little progress in containing the overall influx of nitrates from fertilizers, livestock waste, farm operations, sewage discharges and other sources.
http://www.w3.org/ns/prov#wasQuotedFrom	nationalgeographic.com