- A colorless gaseous substance (O/) obtained (as by the
silent discharge of electricity in oxygen) as an allotropic form of
oxygen, containing three atoms in the molecule. It is a streng
oxidizer, and probably exists in the air, though by he ordinary tests
it is liable to be confused with certain other substances, as hydrogen
dioxide, or certain oxides of nitrogen. It derives its name from its
peculiar odor, which resembles that of weak chlorine.
Ozone depletion Ozone depletion is a decline in the total volume of ozone in the earth’s stratosphere. This depletion in the ozone layer, which protects plant