AIRPod, The Car That Runs On Air

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An AIRPod is a prototype of an alternative fuel vehicle produced by Motor Development International in cooperation with Tata Motors, that is powered by compressed air. The AIRPod comes in three models that vary the number of seats and amount of cargo storage while keeping the same basic chassis.
It is designed as an zero-emission urban vehicle. Prototypes have been tested by KLM/AirFrance for use as emission-free vehicles in airports. MDI has been promising production of the AirPod since 2000 but as of 2012 none have gone on sale. Most experts agree that compressed air cars are inefficient and impractical.