However, while it’s good to minimise idling, vehicles produce far more exhaust gas when they are moving. The amount of exhaust generated goes up roughly with the engine RPM. On top of that, moving vehicles generate dust from tyre and brake wear, especially if they are heavy.
So the ideal vehicle of the future is the smallest, lightest, fully-electric vehicle that meets your needs. And of course if you are able to walk, cycle or use public transport, that’s even better.