There is more to this than meets the eye. An electricity powered vehicle generates more pollution than an IC vehicle, even though the battery powered vehicle generates minimal pollution while running.
Here is why.
An IC vehicle emits pollution at a maximum government allowed SULEV or PZEV rate, often less than ambient.
The electric grid is a sophisticated business, generating electricity at an optimum combination of cost, pollution, and other factors.
When the electric vehicle plugs in to recharge its batteries, the electric grid has to add capacity to satisfy this additional demand. This additional capacity is AT BEST the most costly and/or most polluting, and the situation just gets worse as more batteries are plugged in to be recharged.
There is no way to finesse this issue.
Also, EVs do not pay gas taxes to support the maintenance of our road infrastructure.
The logical limit is if all vehicles are EVs. Then there would be no gas taxes to maintain the roads, and the electric utilities would generate additional pollution which would degrade the environment and increase the death rate. I do not think the average person is in favor of this.
There is a down loadable spreadsheet at
http:// bit.ly/auHe4d that has more on this and allows the interested user to do some elementary modeling of the energy consumption of IC, HEV, PHEV, and EV vehicles.