"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.

"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."

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

"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."