Kai-Uwe Bergmann, partner at BIG, the Bjarke Ingels Group, and host, Ellen Dunham-Jones, discuss the how, what, and why of designing joyful social functions into practical infrastructure at all scales. How did their ideas of hedonistic sustainability embolden them to convince clients to build a ski slope on top of a power plant in Copenhagen, build a concert hall on a highway intersection, turn storm surge fortifications around lower Manhattan into public parks and gardens – let alone design new cities in the desert, on the ocean, and on the moon?