Pet-coke piles on Detroit River draw concern

Published On: Mar 29 2013 11:24:59 PM EDT   Updated On: Mar 29 2013 11:25:26 PM EDT

Concern and complaints over the coal-like substance produced by the Marathon Petroleum Corporation have been piling up. Some see it as an eye-sore while there are those, including some lawmakers, who wonder if it's a health-hazard.