[Untitled photo, possibly related to: Great Lakes boat at Great Northern elevator. Superior, Wisconsin]. Sourced from the… https://www.rawpixel.com/image/12286402/photo-image-person-sky-smokeFree Image from public domain licenseA street in Lowell, Massachusetts. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278245/photo-image-person-sky-public-domainFree Image from public domain license[Untitled photo, possibly related to: Carnegie-Illinois steel company. Etna, Pennsylvania]. Sourced from the Library of… https://www.rawpixel.com/image/12287115/photo-image-cloud-sky-smokeFree Image from public domain license[Untitled photo, possibly related to: A street in Lowell, Massachusetts]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278162/photo-image-cloud-sky-roadFree Image from public domain license[Untitled photo, possibly related to: A street in Lowell, Massachusetts]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278230/photo-image-person-sky-roadFree Image from public domain licensePampa (vicinity), Texas. Passing a carbon plant along the Atchison, Topeka and Santa Fe Railroad between Canadian and… https://www.rawpixel.com/image/12292514/photo-image-plant-sky-smokeFree Image from public domain license[Untitled photo, possibly related to: Columbia Steel Company at Ironton, Utah. Looking upon coke ovens. The steam indicates… https://www.rawpixel.com/image/12297759/photo-image-cloud-steam-personFree Image from public domain licenseLargest smelting furnace in the world. Omaha, Nebraska. Sourced from the Library of Congress. https://www.rawpixel.com/image/12269495/photo-image-person-smoke-public-domainFree Image from public domain licenseHouses and steel mills in Aliquippa, Pennsylvania. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278005/photo-image-sky-smoke-public-domainFree Image from public domain licenseChicago, Illinois. Engines lined up at coaling station at an Illinois Central Railroad yard. Sourced from the Library of… https://www.rawpixel.com/image/12290875/photo-image-steam-smoke-public-domainFree Image from public domain license