There are no environmentally friendly cars. Only some models are less bad for the environment than some other models. The only environmentally friendly car is the one that isn't built.
> The only environment friendly car is the one that isn't built.
That's why buying used is the environmentally best choice.
Buying no car is the best choice. From environmental perspective.
By extension, that also means that the best choice from an environmental perspective is not to have a cell phone, not to turn on the lights or A/C, not to use a computer or the Internet, and not to purchase pre-packaged food.