Located near Sparks, Nev., the Gigafactory recently went on line. By 2018, Tesla predicts that the Gigafactory will produce nearly as many lithium-ion battery cells as the rest of the world. Being built in stages, it is expected to be the biggest building in the world when completed. At peak production, the Gigafactory will employ 6,500 people and support another 20,000-30,000 jobs in the surrounding area.

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