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NEED TO KNOW | Louisiana's disappearing delta | PBS

http://www.pbs.org/wnet/need-to-know/environment/the-disappearing-delta/3318/ The vast marshes off Louisiana's coast have been called an "environmental wonder," but more than a thousand square miles of the wetlands have sunken into the Gulf over the last fifty years. NEED TO KNOW revisits this segment produced by NOW with Bill Moyers. Need to Know airs Fridays on PBS. Watch full-length episodes of Need to Know at http://video.pbs.org/program/1458405365/
Length: 07:54

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