In the lexicon of music there’s a term called inversion. It’s a simple concept. You take a note on top and put it on the bottom. The mechanics of that basic idea can be expanded to include a chord, a phrase, and even an entire melody. Bach and Brahms had a particular genius for inversions, sometimes — almost miraculously — having both the melody and its inversion played simultaneously.
Here in Utah, inversions are equally complex but have notably less appeal. Natural conditions reverse the positions of hot air and cold air, but because human-made pollution is trapped on the bottom we inhale unacceptably noxious air.