[Untitled photo, possibly related to: Phelps Dodge refining company, El Paso, Texas. Copper is recovered from smoke that… https://www.rawpixel.com/image/12295410/photo-image-plant-sky-smokeFree Image from public domain licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/330377/image-rawpixelcomView licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/330353/image-rawpixelcomView license[Untitled photo, possibly related to: deck hand throwing line in docking operations, Burrwood, Louisiana] by Russell Lee https://www.rawpixel.com/image/12168024/image-cloud-hand-artFree Image from public domain licenseTopock (vicinity), Arizona. A state line marker on a bridge over the Colorado River on the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12293824/photo-image-person-sky-public-domainFree Image from public domain licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/330360/image-rawpixelcomView licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/330348/image-rawpixelcomView license[Untitled photo, possibly related to: Middletown, Connecticut, with a bridge across the Connecticut River]. Sourced from the… https://www.rawpixel.com/image/12279094/photo-image-sky-public-domain-archFree Image from public domain license[Untitled photo, possibly related to: Phelps Dodge refining company, El Paso, Texas. Copper is recovered from smoke that… https://www.rawpixel.com/image/12296703/photo-image-plant-sky-smokeFree Image from public domain license[Untitled photo, possibly related to: Construction work of the sewage disposal plant and sewer lines leading to it. About… https://www.rawpixel.com/image/12150721/image-plant-art-vintageFree Image from public domain license[Untitled photo, possibly related to: Freight train operations on the Chicago and Northwestern Railroad between Chicago and… https://www.rawpixel.com/image/12290901/photo-image-technology-crosses-public-domainFree Image from public domain licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/330359/image-rawpixelcomView licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/331450/image-rawpixelcomView license[Untitled photo, possibly related to: San Sebastian, Puerto Rico (vicinity). Workman repairing a crane at a "central"].… https://www.rawpixel.com/image/12280591/photo-image-cloud-person-skyFree Image from public domain licenseTopock (vicinity), Arizona. A state line marker on a bridge over the Colorado River on the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12292708/photo-image-sticker-sky-airplaneFree Image from public domain license[Untitled photo, possibly related to: Textile mills seen from a bridge in Woonsocket, Rhode Island]. Sourced from the… https://www.rawpixel.com/image/12278353/photo-image-cloud-person-skyFree Image from public domain licenseSan Sebastian, Puerto Rico (vicinity). Workman repairing a crane at a "central". Sourced from the Library of Congress. https://www.rawpixel.com/image/12280795/photo-image-person-sky-technologyFree Image from public domain license[Untitled photo, possibly related to: Lined up and waiting for a meal in the camp for flood refugees at Forrest City… https://www.rawpixel.com/image/12252232/photo-image-person-sky-roadFree Image from public domain licenseGraph Data Show Summary Analysis Icon Graphic https://www.rawpixel.com/image/330370/woman-the-phoneView licenseGallipolis, Ohio. Attaching a line to the side of the lock as the front part of the tow goes through. Sourced from the… https://www.rawpixel.com/image/12296220/photo-image-person-sky-public-domainFree Image from public domain license