The Polestar O2 is the latest concept vehicle from the electric automaker, and on top of a wealth of sustainable materials used in its creation, it has a particularly spectacular party piece involving a drone. The two-door, fully electric sports car actually has four seats inside and its hard-top roof can retract, making it a convertible - as Polestar points out, you'll be able to enjoy a more relaxing roof-down experience without the sound of a traditional engine. No performance specs have been revealed for the Polestar O2 yet, but the company claims it's "lively, light and full of confidence" and delivers "exciting, spirited driving" thanks to its bonded aluminum platform. Inside, recycled polyester is the only material used for all the soft components of the cabin, while the different grades of aluminum used throughout the vehicles are clearly labeled, so they can be recycled effectively once the life cycle of the car has come to an end. h