“No fuel,” the engineer said. “A catalyst lattice using waste thermal gradients and phase-change substrates. It harvests heat differentials—city cold and bio-thermal—amplifies them without external input. It’s regenerative.”
“What’s the fuel?” Noviyour asked. noviyourbaezip hot
“You could be their best asset,” the engineer replied. “Or you could run and let us build in the dark.” “No fuel,” the engineer said