AdvertisementHow To Clean Up Fish Farms And Raise More Seafood At The Same TimePlay07:45Download AudioJune 06, 2013Richard HarrisfacebookEmailThierry Chopin from the University of New Brunswick examines a raft that holds strings of seaweed. The seaweed grows around pens of farmed salmon and soaks up some of the nutrients that would otherwise pollute the Bay of Fundy. (NPR)
