The steel mills may be gone, but the south side is again under threat from a growing source of air and water pollution. It's referred to a "petcoke," and is a byproduct of refining heavy tar sands oil. We share what you had to say about it in tonight’s viewer feedback.

Should a 1,900 mile pipeline be built to transport oil sand petroleum from Canada to the United States? Eddie Arruza and his panel take up the controversial proposal.