Half of All Energy Becomes Heat. Now What?

Logosofia no Dia a Dia · Oct 12, 2026 · 22m

Roughly half of all global energy input ends up as waste heat, and the headline numbers say it's the world's largest untapped energy source. The honest numbers say only six to nine percent is economically worth recovering — and the gap between those two figures is the whole story. This episode walks through the thermodynamics of temperature and distance, then visits the two cities that actually built the infrastructure: Copenhagen's 120-year-old district heating habit, including a ski slope on a waste incinerator, and Stockholm's open market where data centers sell surplus heat on…