The presentation should introduce and analyze an interesting environmental regulation proposal, a firm's unique environmental strategy, an environmental opportunity you see in the market, an example of environmental entrepreneurship, an environmental economics research study, or anything else you think would be useful to share with the class. The key is to discover these "stories", learn about the scientific, legal, or political details that drive the issue, use economic concepts to enhance your analysis, and then share all that with the class so as to facilitate discussion.