Question

what emissions from human activities that ozone depletion and what are the principal steps in stratospheric ozone depletion caused by human activities

Answer 1

Human activities cause the emission of halogen source gases that contain chlorine and bromine atoms. These emissions into the atmosphere ultimately lead to stratospheric ozone depletion. The source gases that con- tain only carbon, chlorine, and fluorine are called “chlo- rofluorocarbons,” usually abbreviated as CFCs.