Learn more about why beef is an important industry to the American lifestyle. The charts demonstrate how the prices, production, imports, etc. have changed over time. You can also find out how many farms and how large they are in each state by typing in the two-letter abbreviation. The resulting page will also provide a link to that state's agricultural site with related information. You may be able to gauge this using a newspaper.
Some obvious examples come to mind, like dairy and beef products.
There are also leather goods including shoes, wallets and purses, coats, furniture, etc. Circle or clip items you find in the newspaper, and then organize and classify the information in the form of a presentation.