The EV is far far far more efficient at turning power into motion however, we use loads of fossil fuels to make,,, err fossil fuels-this can then be reduced-the list goes on. The charging station point is most definitely an issue but it's proven than most journeys are far shorter and range is far less than many actually need. In summary;
UK grid is around 50% renewable energy (and rising) - if you have solar or renewable tariff then up to 100%
EV drivetrain is 3 times as efficient at turning fuel into forward motion
EV's are around 25% worse for environment during production but this is offset within about 20k miles (will be less if 100% renewable energy)
No tailpipe emissions so local air quality massively improved
No smell, quieter, smoother driving, cheaper to run and cheaper overall after an average of 5 years.
But ultimately we didn't buy our EV because it's green-it's just far far far more fun to drive than the 228bhp Clubman JCW we replaced it with-just happens to be costing less than 4p a mile-and with current petrol and diesel prices equivalent to 180mpg.
Useful site - http://www.gridwatch.templar.co.uk/ You will find renewables don't make 50% very often, if ever.