Factory chimney, pollution illustration https://www.rawpixel.com/image/10160700/factory-chimney-pollution-illustrationView license[Untitled photo, possibly related to: Chicago, Illinois. Southbound freight train leaving an Illinois Central Railroad… https://www.rawpixel.com/image/12290818/photo-image-cloud-person-skyFree Image from public domain licenseWord Industry and Brick Wall in the Back https://www.rawpixel.com/image/922393/free-image-rawpixelcomView licenseJones and Laughlin Steel Company, Aliquippa, Pennsylvania. Sourced from the Library of Congress. https://www.rawpixel.com/image/12283589/photo-image-person-sky-smokeFree Image from public domain license[Untitled photo, possibly related to: Loading grain boat. Duluth, Minnesota]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12285261/photo-image-sky-smoke-public-domainFree Image from public domain licenseAir Pollution Carbon Dioxide Dirty Energy Toxic Concept https://www.rawpixel.com/image/961565/free-image-rawpixelcomView license[Untitled photo, possibly related to: Steelworkers going home at the end of the afternoon shift. A union official is… https://www.rawpixel.com/image/12278732/photo-image-people-smoke-public-domainFree Image from public domain license[Untitled photo, possibly related to: Streator (vicinity), Illinois. Passing an eastbound freight train on the Atchison… https://www.rawpixel.com/image/12289864/photo-image-cloud-sky-smokeFree Image from public domain licenseFactory Pollution Atmosphere Industry Click Concept https://www.rawpixel.com/image/991795/free-image-rawpixelcomView licenseLoading lake boat with iron ore. Allouez, Wisconsin. Sourced from the Library of Congress. https://www.rawpixel.com/image/12284855/photo-image-person-smoke-public-domainFree Image from public domain licensePollution Dirty Chemical Problem Smog Smoke Concept https://www.rawpixel.com/image/279179/image-rawpixelcomView licenseA textile mill and company houses in Uncasville, Connecticut. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278939/photo-image-person-sky-public-domainFree Image from public domain licenseFactory Pollution Atmosphere Industry Click Concept https://www.rawpixel.com/image/1129341/image-rawpixelcomView licenseFactory chimney, pollution illustration https://www.rawpixel.com/image/10160696/factory-chimney-pollution-illustrationView licenseAir Pollution Carbon Dioxide Dirty Energy Toxic Concept https://www.rawpixel.com/image/848098/free-image-rawpixelView license[Untitled photo, possibly related to: Scene in west Aliquippa, Pennsylvania. Stacks of the Jones and Laughlin Steel… https://www.rawpixel.com/image/12278757/photo-image-background-person-skyFree Image from public domain license[Untitled photo, possibly related to: The Bessemers "blooming" at the Jones and Laughlin Steel Company in Aliquippa… https://www.rawpixel.com/image/12262781/photo-image-sky-smoke-lightFree Image from public domain licenseEnsenada, Puerto Rico. Sugar mill or "central" of the South Puerto Rico Sugar Company. Sourced from the Library of Congress. https://www.rawpixel.com/image/12280081/photo-image-sky-smoke-public-domainFree Image from public domain license[Untitled photo, possibly related to: The Bessemers "blooming" at the Jones and Laughlin Steel Company in Aliquippa… https://www.rawpixel.com/image/12262600/photo-image-fire-sky-smokeFree Image from public domain licenseWest Mine, West Frankfort, Illinois. Now abandoned. This mine has been down about a year (see 26940-D). Sourced from the… https://www.rawpixel.com/image/12272613/photo-image-person-sky-smokeFree Image from public domain license