To make housing more affordable in the U.S., we need more of it. Millions of additional units, by most estimates. This shortage of housing has a range of complex causes, but the high cost of construction — which rose even further thanks to pandemic-driven labor and supply constraints — is definitely not helping. An idea from the tech world holds the potential to make the building process more efficient: 3D printing. Startups have been experimenting with the technology in large-scale construction, and now there’s a push to take it mainstream. Marketplace’s Meghan McCarty Carino spoke with journalist Rachel Monroe, who took a deep dive into the topic in this week’s issue of The New Yorker.