250,000 Swedes Heat a Building with Their Bodies

The idea of harvesting body heat to warm a building might be familiar if you've been reading up on passive house design, so here it is on a grand scale: take a train station in Sweden that sees about 250,000 travelers per day, and recycle all that body heat as clean, renewable energy. The twist is, instead of heating the train station, the heat is being used in another building entirely.