In this episode of Allergic Reaction, Lisa Lomax descends into a real-life Cold War-era bunker—an artifact of past fears that still echoes in our present-day anxieties. But beyond its concrete walls lies a different kind of response: the work of Liam Young, an real-life architect, who is trying to save the world by designing fake ones. Young, also a filmmaker and professor at SCI-Arc, has bold visions for the future. Lisa visits one of his imaginings: Planet City, a single city that houses 10 billion people, the entirety of the world's future population. He invites us to imagine radical solutions to the planetary crisis we face today. This episode explores: - Why old adaptations like bunkers or recycling are insufficient in the face of the coming global challenges - How the science fiction of yesterday is shaping Silicon Valley today - Why the stories we tell shape the realities—and futures—we build Forget the bunker… or build the bunker, but also imagine new worlds.