One of the shrewdest alt-fuel marketing moves Toyota made early on was to create a sub-brand for its hybrid engine technology, with the Hybrid Synergy Drive badge that appears on every Toyota hybrid vehicle.

FORBES: CMO Network

Once the battery charge reaches a certain level it operates like a typical hybrid-powered vehicle, with the 2.0-liter gasoline engine doing most of the work.

FORBES: Ford C-MAX Hybrid/Energi

Stadler drove out onto the stage at the Las Vegas Hilton in an Audi e-tron Spyder concept car, a hybrid vehicle with two electric motors and a twin-turbo V6 engine, capable of zooming from 0 to 60 in just 4.7 seconds.

FORBES: Audi Touts Tech At CES

Yesterday, AUDI AG chairman Rupert Stadler gave his own keynote address at CES, driving out onto the stage at the Las Vegas Hilton in an Audi e-tron Spyder concept car, a hybrid vehicle with two electric motors and a twin-turbo V6 engine, capable of zooming from 0 to 60 in just 4.7 seconds.

FORBES: Ford Launches Its First Fully Electric Car

Because hybrid and electric vehicles produce less sound than vehicles powered by an ordinary internal combustion engine, pedestrians may not be aware of the presence of a nearby hybrid or electric vehicle.

FORBES: Connect