Inside the battle to build a $1.2 billion fish barricade
Briefly

Over the past 50-some years, invasive carp, a stunningly destructive invasive species, have infested almost every waterway in the Midwest, from South Dakota to beyond the Mississippi Delta, and have even reached West Virginia.In some waters, it's been reported that around 90 percent of the fish are invasive carp; in one section of the Illinois River, a Mississippi tributary, they make up more than 75 percent of the total biomass in the water.
Read at Ars Technica
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