Interesting piece from FTAlphaville on the carbon impact of electric vehicles.
First a staggering chart from VW – because battery production is so energy intensive it takes their new e-Golf 120,000 km of driving to breakeven in terms of carbon emissions vs. a diesel Golf.
This does depend on where the electricity used to charge comes from (VW address this) and ignores other gas emissions.
Some analysts suggest that because battery technology is yet to improve the best impact on CO2 emissions is to drive a hybrid.