In the man-made channels connecting the Mississippi, Illinois and Des Plaines Rivers to Lake Michigan lurk fish with the potential to dramatically and permanently alter the biomass of the Great Lakes. Asian carp have been found in the Chicago Area Waterway System, and the effort to keep this injurious species out of Lake Michigan has sparked a multi-state legal battle, resurrecting an 81-year old Supreme Court case and a new request that the System’s locks be closed. At stake is the $70 million shipping industry that relies on the locks, the $7 billion fishing industry that relies on the lakes and the invaluable ecosystem and natural resources that comprise world’s largest freshwater lake system.
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