There were recent reports of possible pollution coming from the plant on Zug Island owned by DTE that produces coke for
making steel. This is one of very few coke plants in the nation.
I believe that DTE asserted they were in compliance with current environmental regulations

What else is produced now on Zug Island? I presume the
steel plant is now closed. In the past, the slab steel produced there was shipped by an automated train on the Delray Connection Railroad to a plant in Ecorse where is was made
into a marketable product. Is that plant in Ecorse also closed?

Early in the Obama administration, I think that MSU, Michigan and several other local large employers sought to
establish a facility on Zug Island to test wind turbine blades.
I think the Obama Administration decided to establish the
wind turbine testing facility in South Carolina.