Electric Vehicles (EV’s) vs. Zero Emission (ZE) Vehicles
Electric Vehicles (EV’s) generally refer to fully battery-electric vehicle (sometimes called B-EV’s). They may also refer to plug-in hybrid electric vehicles (PH-EV’s). There are also the less widely (yet) available hydrogen fuel cell electric vehicles (FC-EV’s).
Incidentally, Zero Emission (ZE) vehicles refer to EV’s that produce zero emissions directly at the tailpipe. Though for a vehicle to truly be considered ZE, we must not only calculate tailpipe emissions, but also, how many emissions are being created to produce & deliver the electricity, fuel cell or petroleum resource used to power the vehicle.
In short, no matter which electrical grid in the world provides your power; B-EV’s create the fewest emissions, then hybrid vehicles and then traditional combustion vehicles. Hydrogen fuel cell powered vehicles create the highest number of emissions (due to the energy required to produce the fuel cells).