Save the Ozone Shield

Abstract

The earth is constantly bombarded by ultraviolet (UV) rays, which consist of two forms UVA and UVB, the latter being more potent. High UVB levels can affect human health, ecosystem productivity and global habitability. However a layer of ozone in the atmosphere, called the ozone shield, protects the earth. Over the years the ozone shield has been destroyed, and a hole has appeared that allows UVB to harm living organisms. The size of the ozone hole is increasing. The main ozone depleting substances, ODS, the chlorofluorocarbons (CFCs) are of anthropogenic origin. Global responses, such as the Montreal Protocol and the response by USA (the major ODS producer), to the threat are mentioned. Importance of individual response is also emphasized. Individual environmental ethics is fundamentally essential. Three ways of minimizing the release of CFCs are suggested. Benefits of reducing CFCs and some case studies of successful CFC elimination are cited.