https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/3259921Edit ImageSaveSaveEditCropCustom TextThe W.G. Swingle greenhouse in Columbus, Ohio growing lettuce between young tomato plants in May 1918. Photo courtesy National Archives and Records Administration.. Original public domain image from FlickrMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 932 px | 300 dpiLarge JPEG 3500 x 2719 px | 300 dpiBest Quality JPEG 3620 x 2812 px | 300 dpiFree DownloadThe W.G. Swingle greenhouse in Columbus, Ohio growing lettuce between young tomato plants in May 1918. Photo courtesy National Archives and Records Administration.. Original public domain image from FlickrMore