@AndiPopp what would save the planet even better would be village shops. It doesn't matter how many ICE trains connect cities well for me, I do not need a car to drive long distance, I need a car to haul food home. 50 years ago the village I live in still had two shops selling the basic needs stuff.
Efficiently organized delivery could be another option (of the "take orders for an entire street, deliver to that street in one trip" variant)