Michigan court vacates key permit, delaying Enbridge Line 5 pipeline project amid legal battles.

The Michigan Supreme Court vacated a crucial permit for Enbridge's Line 5 pipeline tunnel under the Straits of Mackinac, requiring a new environmental review and delaying the project. This adds to ongoing legal disputes involving Michigan's governor seeking to shut the aging pipeline, federal government interventions, and a court ruling ordering rerouting off tribal lands in Wisconsin. Line 5, vital for cross-border energy transport, faces uncertainty as courts weigh environmental, treaty, and property issues. The pipeline, built in 1953, remains critical but increasingly contested amid modernization and legal challenges.