ScienceDaily: Sharing your neighbour's car may be the most climate-friendly way of getting to work. One shared car can replace as many as 13 privately owned vehicles. In the green, smart city of the future, we will probably travel quite differently from today. Maybe we'll live right by the train station and cycle to the office on a shared city bike. Or we may check an app on our mobile to see if anyone else is heading in the same direction, so that we can drive together. Both ride-sharing and car-sharing are...