One Detroit

The Motor City finds ‘political will’ for cleaner air.
The story starts in 2013, when residents living in Windsor, Ontario in Canada noticed big black piles of some kind of material along the Detroit shoreline south of downtown.
A truck arrives with more petcoke on Detroit’s waterfront in 2013. Photo courtesy Stephen Boyle, FuzzyTek Images
It turned out to be petroleum coke, or petcoke, a byproduct Canadian tar sands oil processed at the Marathon refinery in Southwest Detroit.