The plan to dig a nearly four-mile tunnel underneath the Straits of Mackinac and replace the Line 5 oil and gas pipelines continues to move forward.
Last week, Michigan’s Department of Environment, Great Lakes, and Energy said the plan complies with environmental laws on wetland protection, cultural resources, and wastewater discharge.
But other state and federal agencies still need to weigh in on the project. And one big sticking point is climate change and whether carbon emissions from burning the oil and gas that flow through Line 5 should be a factor in deciding if the tunnel project gets greenlit.