Not enough information.
Electric vehicles aren't the be-all-and-end-all they're being made out to be: the charge comes from (primarily) fossil-fuel power stations - so these arguements don't wash (manufacturers like to use the arguement of "no exhaust gases").
There's nowhere enough R&D been done so far - to truly say an electric vehicle is cleaner than its fossil-fuelled bretheren, you have to quantify the carbon produced over both vehicles life-cycles, from mining the metals used right through the manufacturing process, covering the same mileage over 8 / 10 /12 years, with the same riding style, work out the carbon used per charge and the distance it gives, (bear in mind power station efficiency losses, losses in power distribution lines etc), and at the end of the vehicles lifespan, both have to be disposed of; at the moment we haven't got the infrastructure to dispose of batteries / motors / control systems and the materials used.
Not only that, but electric vehicles are heavily dependent on Rare Earth motors / magnets; RE is mined in places like China and treated with chemicals and acids, and these chemicals are allowed to run on to farmland, into rivers, and potentially into the food chain - therefore, we may simply be swapping one form of pollution for another.
Put it altogether, and you may well find that the environmental case for them isn't there.