Zero emission is not possible
Zero emission is not possible as long as fossil fuel is used to generate electricity.
We have a 2014 Volt that was purchased new. It has been the best car we have ever owned. When it was purchased, gas was $4.00 per gallon and we saved enough money to make the car payment, and that's why we bought it. The Volt is the most misunderstood car ever made... and I think GM did that on purpose, as it was rumored that the car cost more to manufacture than it sold for.
I do not want to be range limited and will never buy a BEV. I do not want to plan my trip around charging stations. I do not want to wait for hours while my car charges. I do not want to wait while someone else's car charges, so i can charge. Might as well take a bus.
Range and long recharge time is the problem with BEV's. Until that is solved, BEV will be a niche.
I bet that most BEV owners have a gas car too. If they had a Volt, they wouldn't need another car.
I predict that there will be a lot of used Tesla's for sale after the newness and panache wears off and range anxiety and charging fatigue sets in.
When it comes time to replace our Volt... it will not be with a BEV.