Electric cars may have zero emissions, but the fact of the matter is that they damage the environment just as much. When that battery is no longer usable it get's stored in a container along with other ones alike, then years latter that container will leak and the acid and other chemicals from the batteries will leak into the ground destroying the soil and contaminating ground water,And unfortunately that's not just car battery's doing that.So yes they may help the environment in the short run, but long term they are much more worse in my opinion. With the hydrogen cars many of the problems and impediments can be fixed with advancing technology.