With good reason . . .
“Two Years On, Tar Sands Spill Casts Long Shadow”
“When conventional crude is spilled into water, it floats on the surface, making the cleanup process a relatively simple matter of skimming and scooping (you might recall images of this from the Deepwater Horizon spill). But bitumen is thick and heavy, and has to be diluted with a noxious chemical cocktail so it can flow in the pipe. When spilled, the dilutant evaporates into the nearby atmosphere; Marshall residents reported nausea, migraines, and burning in the eyes and throat. Meanwhile, the bitumen separates from the dilutant and sinks to the bottom.”