Because Nissan LEAF does not have an internal combustion engine, Nissan has incorporated an "Approaching Vehicle Sound for Pedestrians" system, which is designed to alert pedestrians that a vehicle is approaching.

ENGADGET: Nissan starts US production of 2013 Leaf, vows faster charging and a lower entry price

Nissan also plans to upgrade the engine in its Titan full-size pickup truck and seek to double that vehicle's U.S. sales, he said.

WSJ: Nissan Plans to Pass Honda in U.S.

The 1993 Nissan Pathfinder was left with its engine running and hazard lights flashing in Times Square on Saturday evening - when the square was packed with tourists and theatregoers.

BBC: US tightens security after Times Square bomb plot

Toyota, Nissan and General Motors are all striving to develop ceramic car engine parts.

FORBES: The Hug Of The Bear

Nissan offers a four-cylinder and a six-cylinder engine in the new Altima.

FORBES: Test Drive: 2013 Nissan Altima

It has a highly fuel-efficient gasoline engine that gives Volt drivers a peace of mind and a confidence about not being stranded that drivers of Nissan Leaf and other EVs can only envy coupled with most of the advantages of being able to drive Volt in electric-only mode when desired.

FORBES: Memo To McCann, Mahoney: Come Up With Better Volt Ads