French automaker Peugeot Citroen's latest automotive innovation — named "Hybrid Air" — operates on compressed air, gasoline or a combination of the two, DigitalTrends.com reports.

At speeds above 43 mph (70 kilometers per hour), the car uses a standard three-cylinder gasoline engine with an automatic transmission.

But when the driver slows down below 43 mph, as in typical city driving, the car uses compressed air to power a hydraulic motor, allowing the gasoline engine to shut down.