On August 24, 2011, the US Court of Appeals for the Seventh Circuit ruled against five states' effort to prevent the spread of Asian carp in the Great Lakes. Michigan, Minnesota, Ohio, Pennsylvania, Wisconsin and concerned organizations sought to close two Chicago waterways in an effort to halt the invasive species' spread. The 100 pound fish reproduce rapidly and threaten native fish in the region. The five states believed that the Asian carp would harm the $7 billion Great Lakes fishing industry. The opposing parties in the lawsuit were Illinois, the Obama administration, the Environmental Protection Agency (EPA) and the US Army Corps of Engineers. In December 2009, Michigan unsuccessfully sued Illinois in the US Supreme Court over this issue. In February 2012, the Supreme Court declined to grant certiorari on appeal of the Seventh Circuit's decision.
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