CNN —
Porsche unveiled the first hybrid version of its most famous sports car, the 911, on Tuesday, a move that could help electric motors become more accepted even in performance cars.
The move also marks a major step in the evolution of one of the most recognizable cars in the world. Given their generally greater fuel efficiency without the sacrifice of power, hybrids have become commonplace in many types of vehicles. They have become increasingly popular in the United States even as sales of purely electric models have started to slow.
The German automaker
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