increase confidence in our understanding of stratospheric ozone depletion.Observations show that halogen source gases and reactive halogen gases are present in the stratosphere on the amounts required to cause noticed ozone depletion (see Q7). Ozone depletion by halogen supply gases happens globally (see Q12). Many halocarbon gases emitted by human activities are also known as ozone-depleting substances (ODSs); all ODSs contain not less than one chlorine or bromine atom (see Q7).
The stratospheric ozone depletion process begins with the emission of halogen source gases by human activities and natural processes. The reactive gases shaped from halogen source gases