The document describes a future underwater city called B.O.JOE. It was created after the mayor's original city was destroyed by animals who had turned immortal due to deforestation. B.O.JOE is located underwater for safety and provides everything its 100,000 citizens need, including jobs, schools, hospitals, parks, and energy from geothermal, solar, and biomass sources. It is shaped like a diamond to maximize light intake for agriculture. Transportation includes trains along straight lines with multiple stations. The city aims to provide a peaceful life for residents protected from disasters that affect land and air.