" She inhaled the complex odors, from vegetation, water vapor, industrial waste gases. Barrayar permitted an amazing amount of air dumping, as if . . . well, air was free, here. Nobody measured it; there were no air processing and filtration fees. Did these people even realize how rich they were? All the air they could breathe, just by stepping outdoors, taken for granted as casually as they took frozen water falling from the sky. "
― Lois McMaster Bujold , Barrayar (Vorkosigan Saga, #7)