Based on my understanding of Electric Vehicles ("EV's") is that their effects on the environment depend a lot on the source of their electricity. Since 60% of all electricity in America is from Coal fire plants, it appears really we are looking at a region oriented approach to electricity production in which electricity by popular renewable means such as wind and solar. The more the electricity is from these sources, the cleaner an EV is.
So my assertion is this: Let's take a closer look at Nuclear energy. I know that mainstream media and the leftists hate Nuclear and want us all to grow plants and use limited resources to make the planet a better place, but that is not sustainable. I would say that if we can manage Nuclear power better, the EV suddenly becomes VERY good for the environment.
Just my thoughts on the subject.