Groups sue EPA, want tougher ship discharge rules

(AP) -- Environmentalists sued the federal government Monday over new rules that critics say do too little to prevent cargo ships from dumping invasive species into the nation's waterways.

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<p><a href="http://www.physorg.com/news151051786.html">Groups sue EPA, want tougher ship discharge rules</a></p> <p>(AP) -- Environmentalists sued the federal government Monday over new rules that critics say do too little to prevent cargo ships from dumping invasive species into the nation's waterways.</p>