In this Feb. 16, 2012 photo, Charles Cart, senior chief engineer for the S.S. Badger, stands at the wheel of the 410-foot car ferry while docked in Ludington, Mich. Cart says it could take several ... more 
In this Feb. 16, 2012 photo, Charles Cart, senior chief engineer for the S.S. Badger, stands at the wheel of the 410-foot car ferry while docked in Ludington, Mich. Cart says it could take several years to switch the Badger from coal to natural gas and satisfy regulators who want the ship to stop dumping coal ash into Lake Michigan. (AP Photo/John Flesher) less 
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Associated Press | Photo By John Flesher
Wed, Mar 7, 2012 4:28 PM EST