Read this passage from "Exhalation" by Ted Chiang: One sect has dedicated itself to the goal of reversing the
equalization of pressure, and found many adherents. The
mechanicians among them constructed an engine that
takes air from our atmosphere and forces it into a smaller
volume, a process they called "compression." Their engine
restores air to the pressure it originally had in the reservoir,
and these Reversalists excitedly announced that it would
form the basis of a new kind of filling station, one that
would-with each lung it refilled-revitalize not only
individuals but the universe itself.
Which two ideas does the passage most clearly develop?