Economics' Jonathan Ernest weighs benefits of Great Lakes shipping

Need a burger? A car? Winter road salt? Thank cargo ships on the Great Lakes
Marketplace, NPR: Jonathan Ernest, assistant professor of economics at Weatherhead School of Management, said Great Lakes shipping remains an economic backbone because it moves massive quantities of cargo—including steel, grain and road salt—more efficiently than trucks. Shipping by water reduces fuel use, pollution, road congestion and transportation costs, making it an indispensable part of the regional and national supply chain.