If we could wave a magic wand and suddenly make it so that the currently-externalized costs to everything that we do (e.g. the costs of correcting all the downstream impacts of things like driving a mile down the road, manufacturing a plastic bottle, ordering meat, disposing of waste items, etc.) became rolled into the up-front costs of these activities paid by companies and consumers, we'd have correct incentives informing every aspect of society and cities/commutes would look much different (out of necessity).