View of tomatoes inside one of the solar greenhouses at the University of Arizona Environmental Research Laboratory at… https://www.rawpixel.com/image/8799699/photo-image-plant-public-domain-woodFree Image from public domain licenseCacti and flowers near Tucson. Original image from Carol M. Highsmith’s America, Library of Congress collection.… https://www.rawpixel.com/image/434003/free-photo-image-forest-cactus-desertFree Image from public domain licenseTerrain in the Arizona-Sonora Desert Museum -- a botanical garden, natural-history museum, and zoo in a single facility --… https://www.rawpixel.com/image/582273/carol-highsmiths-arizona-photographFree Image from public domain license