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I read this recent study: http://onlinelibrary.wiley.com/doi/10.1111/j.1530-9290.2012.00532.x/full
It shows how toxic EV are to the environment during production compared to normal cars. Add to that that lithium is a finite Earth resource and that these lithium batteries are not recycled, litihum batteries are extremely toxic and no one is recycling them. They production of EV makes the ground surface toxic, the water supply, aerosol toxicity etc.
Why do people believe EV are so harmless when they are one of most toxic things every made?
Things like trains and subways are green, since they directly use the electric current and don't need huge batteries to store it, but why do people think electric cars are "green", just because it has the word electric in them?