Odor Removal is an Ozone treatment against odors. Ozone (O3) is a colorless gas with a distinct, pungent odor. It is a molecule made up of 3 atoms of oxygen. Ozone occurs in nature, most often as a result of lightning strikes that occur during thunderstorms. In fact, that “fresh, clean, spring rain” smell that we notice after a storm most often results from nature’s creation of ozone. Ozone generators create ozone in your home or business ensuring the same clean air as found in nature.