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US State Builds Wall to Fend Off Asian Carp Invasion

A three-kilometer long wall of earth, 23 meters wide and as high as three and a half meters, could be all that stands between the Great Lakes and an invasion of Asian Carp. The berm runs through Eagle Marsh, in the midwestern state of Indiana. During large floods, the 290-hectare wetland drains into the Great Lakes. And that's the problem the berm was designed to address, says Betsy Yankowiak, Director of the Little River Wetlands Project. "Basically a whole bunch of federal...

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