Definition

"Carsharing is a system in which a fleet of cars is jointly-owned by the users.

This is different from Car pooling in which cars are owned privately and simply drivers allows passengers to use the empty car sits on their car. The key difference between Carsharing and Carpooling: carpooling exploits the cars already owned by people, carsharing exploits cars bought precisely for and by the carsharing group." (http://wiki.couchsurfing.com/en/CarSharing)