Finally, after it felt like we’d been crawling along the highway for months, the Columbus skyline appeared on the horizon, glittering like Oz at the end of the yellow brick road. We arrived around sunset, and already there were more electric lights burning in the city than I’d ever seen at one time. I’d read that giant solar arrays were positioned throughout the city, along with two heliostat power plants on its outskirts. They drank in the sun’s power all day, stored it, and fed it back out each night.