Credo is an academic alternative to Wikipedia. It includes topic pages with mind maps (examples: agriculture, cattle, and organic food) and specialized entries from several encyclopedias, dictionaries, and other reference sources (example: Food Justice, from Encyclopedia of Diversity and Social Justice and Fishing and Fish Stocks from Global Social Issues: An Encyclopedia). As a reference source, it's a good place to start and to help formulate your topic.
The databases featured in this box are particularly useful for this class. You can learn more about databases on the Research Hub's Databases tab.
Try some of these subject headings in WorldCat:
Food supply United States | Sustainable agriculture | Corn history | Sustainable Living| Meat industry and trade | Food industry and trade | Natural foods | Food marketing | Agriculture Environmental aspects | Food habits | Food consumption| Agricultural innovations social aspects | Feeding Behavior | Food Preferences