One such area being addressed is how to distribute a stable electric current across a ship-based grid.

ECONOMIST: MONITOR

At slow speeds, it runs only on an electric motor powered by the ship's auxiliary turbine.

ECONOMIST: Monitor

Fuel that makes energy to ship goods, or make electric for homes and manufacturing.

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The automaker plans to ship a small number of Focus Electric starting in December.

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In 2002 the Army Corps of Engineers (ACE) installed a series of electric barriers 37 miles downriver in the Chicago Sanitary and Ship Canal, an artificial channel that links the lakes with the Mississippi and its tributaries.

ECONOMIST: The Great Lakes