Great Lakes (IL IN MI MN OH WI)

The Cuyahoga River, which became a symbol of pollution when it caught fire 40 years ago, has come back to life.

"Five wildlife protection groups today filed legal action challenging the removal of Endangered Species Act protections for gray wolves in the western Great Lakes region."

"At least 10,000 more properties in residential neighborhoods of Evansville will be tested for lead and arsenic contamination in the soil of their yards" from foundries going back to the 1880s.

"Nearly a month after the onset of a navigational dredging project in the Saginaw River that some worry will send dioxin-contaminated sediments downstream toward the intakes for Bay City’s water supply, EPA officials responded to citizen concerns by announcing it would not test the water for the toxin."

"The largest, deepest and coldest Great Lake holds another distinction -- the highest levels of the contaminant toxaphene in the region and possibly anywhere in the world."

"Even today the Great Lakes landscape is bouncing back from the glaciers that retreated 10,000 years ago. A key question researchers recently sought to answer is whether that has anything to do with fluctuating lake levels."

A historic ferry that carries cars and passengers across Lake Michigan is still dumping ash from its coal-fired engines into the Lake -- legally.