Closing the Mississippi River: Safe but Costly
![](https://media.wnyc.org/i/800/0/c/85/photologue/photos/Spillway.jpg)
The Atchafalaya Delta, in Louisiana.
( Flickr user: eutrophication&hypoxia )
( Flickr user: eutrophication&hypoxia )
Produced by Arwa Gunja