How does one polish a cactus? Remove the needles, of course._That’s what Citroën has done with its funky-French C4 Cactus crossover_to_create the Airflow 2L concept, which makes its aerodynamic, in-the-succulent debut at the 2014 Paris auto show next week. Citroën shaved this Cactus for one reason: Fuel economy. In an automotive sense, a car’s “needles” […]

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