"An increasingly warm climate is worsening the problem of harmful Great Lakes algae blooms by boosting the intensity of spring rains that wash phosphorus into the waters, a scientist said Wednesday during a conference for advocates and policymakers."

"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."

"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."

"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."

"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.

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.