Research project about the scientific human impact on the Ozone layer like 4 slides in PowerPoint about it provide some pictures and chemical formula 

scientific research presentation using PowerPoint that addresses the human impact on ozone layer . research focusing on the Chemistry aspects of the human impact of Ozone layer

Also, provide References: Your references must be listed at the end of your presentation using APA format. Citations must be complete and references listed in alphabetical order by authors last name. you can use  a variety of sources including newspapers, periodicals, scientific journals, WWW, full-text databases, etc. Books should be used sparingly as they are often outdated. Encyclopedias are not acceptable references