Journal articles and reports covering the earth sciences, environmentalism, and sustainability during the second half of the 20th century.

With a sub-collection ("thematic area") on the environment, and other relevant sub-collections on cattle ranching, mining and gold rush, and .. Document types include tavel narratives, manuscripts, personal papers, printed books, maps, city directories, store catalogs, newspapers, company records, and ephemera (e.g. trade cards, posters, photos, claim certificates, city prospectuses, and more) that document the American west in its frontier period.

Variety of sources, ca. 1514-2010, that document the role of food in world history, with emphasis on North America and Britain. See especially the sub-collections Food Production and Industry, Farming and Agricultural Industrialization, and Food Systems. Document types include Cookbooks, menus, advertisements, food labels, pamphlets, ephemera (trading cards, stamps, posters, postcards, scrapbooks (also called "guardbooks" in this collection), marketing reports, business records, maps, photographs, books, periodicals, diaries, correspondence, government documents, realia, episodes of the radio program "Adventures in Gastronomy", and a variety of film footage from Heinz..

1500-present. See especially the sub-collections on Ecology and Environment, Cultivation, and Production. Collection includes business records, shipping manifests, correspondence, government reports, pamphlets, statistical records, maps, photographs, paintings, prints, advertising, and other artifacts, thematically arranged by the following commodities: chocolate, coffee, cotton, fur, opium, oil, porcelain, silver, spices, sugar, tea, timber, wheat, wine, and spirits.