"Canada and the United States have updated a decades-old agreement to protect the Great Lakes, adding new commitments to protect aquatic habitats, curb invasive species and help coastal communities adapt to climate change."

"CLEVELAND -- The mystery deepens, as several agencies not only look for the reason why tens of thousands of fish washed up dead along the northern shores of Lake Erie, but seagulls as well."

"Long-awaited dredging will begin this month in Waukegan Harbor to remove soil contaminated with hazardous substances at a Superfund site once described as the 'world's worst PCB mess,' officials announced Thursday at the Waukegan Yacht Club."

"The wildlife agency in Wisconsin, the only state that allows people to use dogs while hunting wolves, faces a lawsuit contending that it is permitting state-sanctioned animal fighting."

"Enbridge Inc plans to restart on Tuesday a pipeline that leaked more than 1,000 barrels of crude onto a Wisconsin field after receiving the greenlight from U.S. regulators."

"U.S. Steel violated the Clean Air Act numerous times — in one case, more than 15,000 times — at its Gary Works facility and two other plants in Michigan and Illinois, according to a lawsuit filed by the federal government Wednesday in the U.S. District Court in Hammond."

Lake Ontario's lake trout have been a key indicator of pollution that affects humans and other species.

"MADISON, Wis. -- Federal transportation officials have ordered a Houston-based energy transportation company not to re-open a pipeline after it ruptured and leaked oil into a Wisconsin field."

Ann Arbor's stretch of the Huron River seems an oasis where people can go kayaking and tubing to cool off in the summer. But not far from the river, the ruins of a coal-gas plant dating back to the late 1800s may still be oozing pollutants into the groundwater.

"A settlement reached between environmentalists, the state's pollution regulators and the state's largest steel mill raises questions about the agency's actions -- and invites scrutiny of its leader."

"The Environmental Protection Agency on Wednesday approved a first-of-its-kind program to cut phosphorus levels in Wisconsin's lakes, rivers and streams."

"LAKEPORT, Mich. -- Diesel fuel from a barge that sank in stormy Lake Huron has reached the Michigan shoreline, the U.S. Coast Guard said Thursday evening."

"Federal investigators seeking the cause of a North Side train derailment are taking a close look at the tracks, after early scrutiny of the crew's actions and the train itself revealed no glaring problems."

"Until now, scientists could only guess at the amount of plastic waste in the Great Lakes. This week, a team of researchers sets sail to conduct the first-ever survey of plastic pollution in the world’s largest fresh water system."

"COLUMBUS, Ohio -- A freight train derailment and explosion in Columbus, Ohio, has authorities evacuating a mile-wide area of the city as they try to contain the blaze and determine what's burning."