General Motors announced Monday that it will begin repaying $6.7 billion in government loans before the end of the year and could pay back the full amount as early as next year, five years ahead of schedule.

General Motors announced Tuesday that its long-awaited Chevrolet Volt hybrid, a battery- and gas-powered electric vehicle, can get 230 miles per gallon in city driving, dwarfing every other car on the market in fuel efficiency.

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