When you visit one of the Great Lakes, whether it’s a sandy beach or a rocky coastline, it’s hard to imagine how something so big could be affected so profoundly by alien invasive species, or pollution, or climate change. This Environment Report special looks at each of these threats.

On Thursday, environmental groups and Native Americans plan to present Enbridge Energy with symbolic eviction notices. They want Enbridge to abide by Governor Gretchen Whitmer’s order to shut down Line 5 in the Straits of Mackinac. In November 2020, Governor Whitmer revoked the easement for...