Electric vehicles are fantastic in theory, but the big concern is how much pollution is created in manufacturing the li-on batteries for all these cars. If I remember correctly, the entire process of making electric cars is actually dirtier than just driving a very efficient and modern turbo diesel for a number of years.
We need to invest more time and money into the carbon nanotube battery technology. When we can utilize their potential, we will have truly solved a large portion of the pollution problem. The next step is making the manufacturing of car parts, shipping, and actual electricity production cleaner.