Australia has more than twenty million registered vehicles. Replacing each one with a new electric car is the most expensive, most wasteful path to a clean fleet - billions of dollars, decades of manufacturing, the existing fleet sent to landfill. So we asked the other question. What if the car you already own could be electrified, instead of replaced?

The Multi-Level Car Park Battery Bank takes a piece of city infrastructure most cities have too much of, the multi-storey car park, and turns it into the conversion workshop. You drive in petrol. You drive out electric. The roof runs the workshop on its own solar. The mechanics are the same trade you've always known, retooled for the next century. There's an RACV helpdesk for the people who want to do the job themselves.

Every existing car becomes upgradeable instead of disposable. The petrol engine you leave behind re-enters the materials cycle - parts for a working vintage vehicle, feedstock for the next build. The mechanics keep working: their skills don't expire, they expand. And while you wait, the Mobile GP runs- blood pressure, eyes, hearing, the maintenance you'd otherwise forget. A diagnostic for the car becomes a diagnostic for the driver.