The largest factory I ever visited was an automobile tire-manufacturing complex with more than 10,000 workers. At the time, I was working with a professor on a project to calculate the environmental impact of tire recycling. My colleague – let’s call her Kate – and I were dispatched to take a tour of the complex and see tire manufacturing firsthand. That was the ostensible reason, anyway. The real reason we were there was to schmooze with the plant managers in the hopes of obtaining one of their environmental audit reports.