Dan Neil:

HENRY FORD WAS A smart guy but he never did the math when he decided to put every American household on wheels.

A century after the Model T, the world has a problem with cars. The U.S. and China will consume about 40 million light vehicles in 2015, according to IHS. Globally, we’re on track to hit 100 million vehicles in 2020.

That’s not a lot of cars. That’s an ocean of cars, an inundation, wave after wave breaking on the shores of the industrialized world. And yet policy makers and common folk alike have been powerless against the siren song of the automobile. Even in the most car-blighted burg in the world, the toxic parking lot they call Beijing, the appetite for the automobile—as status item, as luxury, as totem of personal mastery in a fragile postcolonial mind-set—is driving millions more into its smoggy embrace, despite limits on ownership and the government’s rising alarm.