Another thing to consider with hybrid or electric cars is that there is no free lunch. You may drastically reduce emissions while driving these but how much pollution are you causing by mining the raw material, then making these lithium batteries and finally disposing of them? Another point is how clean is the source that you use to supply the electricity to an e car? I wonder if it is a zero sum game in the end. You may in the end just wind up shifting where the pollution is introduced into the environment.

Bob