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Nissan Motor Co. said Tuesday its electric vehicles will be affordable, setting sights on the potentially lucrative market with a plan to mass produce zero-emission cars globally from 2012.

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Millions ride rickety old rail cars on US subways (GMA News)

Millions of passengers in cities across the United States ride old subway cars like the ones that crumpled in a deadly crash in the nation's capital. The largest transit systems depend on such cars for more than one-third of their fleets, despite safety worries expressed by federal investigators more than three years ago.

Nissan to make electric cars in Tenn. with fed help (Detroit News)

Nissan Motor Co. will start making electric cars in the United States in 2012 with the help of a $1.6 billion loan provided by the U.S. government to encourage automakers to produce cleaner and more fuel-efficient vehicles.