Seraph City

Seraph City is the primary city in The Carbon Coast novels, housing over 7 billion people. It is rumored to its citizens that the lands outside of its massive solar panel-lined walls are desolate and deadly. Legends have told of "The Carbon Coast"—an entire sea of ash and smoke falling over desolate, ruined lands that were burned in a massive wildfires in the wake of volcanic eruptions still active today. As it is nearly impossible to leave Seraph City, no one in recent generations seems to know whether the lands outside of the massive city's bounds are really so desolate or not, yet in a solar-powered, ecotopian city so well-maintained and sustainable, it's hard to really care what could be outside it.