https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8802815Edit ImageSaveSaveEditCropCustom TextMotorists Wait In Line At Soldier's Field, One Of Nine Auto Pollution Tests Sites Conducted Free By The City Of Chicago's Environmental Control Department, 08/1973. Photographer: White, John H. Original public domain image from FlickrMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 816 px | 300 dpiLarge JPEG 3000 x 2039 px | 300 dpiFree DownloadMotorists Wait In Line At Soldier's Field, One Of Nine Auto Pollution Tests Sites Conducted Free By The City Of Chicago's Environmental Control Department, 08/1973. Photographer: White, John H. Original public domain image from FlickrMore