Air pollution background https://www.rawpixel.com/image/11560046/air-pollution-backgroundView licenseIndustrial Construction Engineer Pollution https://www.rawpixel.com/image/91618/free-photo-image-industry-harbour-businessView license[Untitled photo, possibly related to: Country road. Marshall County, Iowa]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12284441/photo-image-cloud-plant-skyFree Image from public domain licenseRow of cottages, Burrwood, Louisiana. This is chiefly a base for dredging operations of U.S. Engineering Corps by Russell Lee https://www.rawpixel.com/image/12167980/image-plant-person-artFree Image from public domain licenseNorthern Pacific railroad tracks west of Fargo, North Dakota. Sourced from the Library of Congress. https://www.rawpixel.com/image/12272358/photo-image-plant-sky-treeFree Image from public domain licenseFramework being completed for fire lookout station on Oregon coast land use project. Sourced from the Library of Congress. https://www.rawpixel.com/image/12270779/photo-image-cloud-plant-fireFree Image from public domain licenseU.S. Highway 80, Texas, between Dallas and Fort Worth. Trailer park. Sourced from the Library of Congress. https://www.rawpixel.com/image/12270405/photo-image-cloud-plant-personFree Image from public domain license[Untitled photo, possibly related to: Ransom, Illinois. Going through the town on the Atchison, Topeka and Santa Fe Railroad… https://www.rawpixel.com/image/12290151/photo-image-person-sky-technologyFree Image from public domain licenseBaltimore-Washington Boulevard, U.S. Highway No. 1. Baltimore, Maryland. Sourced from the Library of Congress. https://www.rawpixel.com/image/12276087/photo-image-person-sky-treeFree Image from public domain licenseGreenville, South Carolina. Air Service Command. Men of the 1067th signal company of the 25th service group stringing… https://www.rawpixel.com/image/12294926/photo-image-plant-people-skyFree Image from public domain licenseComputer network server for data illustration https://www.rawpixel.com/image/476204/free-photo-image-backup-center-cloud-computingView licenseBarstow, California. Pulling out of the Atchison, Topeka and Santa Fe Railroad yard. Sourced from the Library of Congress. https://www.rawpixel.com/image/12293800/photo-image-sky-road-public-domainFree Image from public domain license[Untitled photo, possibly related to: Flagstaff (vicinity), Arizona. Diesel freight train rounding a curve on the Atchison… https://www.rawpixel.com/image/12292628/photo-image-plant-sky-treeFree Image from public domain license[Untitled photo, possibly related to: Iowa countryside along the Atchison, Topeka, and Santa Fe Railroad yard between Fort… https://www.rawpixel.com/image/12291177/photo-image-cloud-sky-technologyFree Image from public domain licenseEcology wind turbine icon on isolated https://www.rawpixel.com/image/476060/free-photo-image-eco-power-alternative-energyView licenseU.S. Highway 80, Texas, between Fort Worth and Dallas. Tourist court. Sourced from the Library of Congress. https://www.rawpixel.com/image/12270206/photo-image-cloud-plant-personFree Image from public domain license[Untitled photo, possibly related to: Iron furnace in Jackson, Ohio]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12252472/photo-image-plant-person-skyFree Image from public domain license"Track storage". Potato storage house at the Bangor and Aroostook Railroad in Fort Kent, Maine. Sourced from the Library of… https://www.rawpixel.com/image/12278090/photo-image-plant-person-skyFree Image from public domain licenseComputer network server for data illustration https://www.rawpixel.com/image/476080/free-photo-image-processor-illustration-backup-centerView licenseBingham Canyon, Utah. Blasting at an open-pit mine of the Utah Copper Company. Sourced from the Library of Congress. https://www.rawpixel.com/image/12295467/photo-image-sky-mountain-public-domainFree Image from public domain license[Untitled photo, possibly related to: Chicago, Illinois. General view of the north classification yard at an Illinois… https://www.rawpixel.com/image/12290530/photo-image-person-sky-smokeFree Image from public domain license[Untitled photo, possibly related to: Las Vegas, Nevada. A view of the plant of Basic Magnesium Incorporated, showing… https://www.rawpixel.com/image/12297374/photo-image-plant-person-skyFree Image from public domain licenseGuanica, Puerto Rico (vicinity). At the loading station. Here cane is loaded by crane on to freight cars to be shipped to… https://www.rawpixel.com/image/12280220/photo-image-cloud-cow-plantFree Image from public domain 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 licenseCamden (vicinity), Missouri. A farmstead along the right of way on the Atchison, Topeka, and Santa Fe Railroad between… https://www.rawpixel.com/image/12291441/photo-image-cloud-plant-skyFree Image from public domain license[Untitled photo, possibly related to: Las Vegas, Nevada. A view of the plant of Basic Magnesium Incorporated, showing… https://www.rawpixel.com/image/12297863/photo-image-plant-person-skyFree Image from public domain licenseLas Vegas, Nevada. A view of construction of telephone lines, roads and buildings of the Basic Magnesium Incorperated plant… https://www.rawpixel.com/image/12298137/photo-image-plant-person-skyFree Image from public domain license[Untitled photo, possibly related to: Norris Dam, Tennessee]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12252951/photo-image-plant-sky-treeFree Image from public domain license[Untitled photo, possibly related to: Coal train going through center of mining town. Davey, West Virginia]. Sourced from… https://www.rawpixel.com/image/12247816/photo-image-plant-person-skyFree Image from public domain licenseLas Vegas, Nevada. A mass of transmission towers and transformers redistributing power from Boulder Dam to Basic Magnesium… https://www.rawpixel.com/image/12297916/photo-image-person-sky-technologyFree Image from public domain license[Untitled photo, possibly related to: Greenville, South Carolina. Air Service Command. Men of the 1067th signal company of… https://www.rawpixel.com/image/12294907/photo-image-plant-person-skyFree Image from public domain license[Untitled photo, possibly related to: At a New England Dairies creamery in Enosburg Falls, Vermont]. Sourced from the… https://www.rawpixel.com/image/12280960/photo-image-person-sky-roadFree Image from public domain licenseIsleta, New Mexico. Hoops with messages in place to be picked up by passing train on the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12292479/photo-image-sky-road-public-domainFree Image from public domain licenseAutos have to turn on lights to penetrate gloom of dust storm. Amarillo, Texas. Sourced from the Library of Congress. https://www.rawpixel.com/image/12265937/photo-image-plant-sky-smokeFree Image from public domain licenseHill Wind Turbine Green Outoors Environmetal Conservation Concept https://www.rawpixel.com/image/72983/premium-photo-image-agriculture-choice-cleanView licenseSign along Route 40, central Ohio (see general caption). Sourced from the Library of Congress. https://www.rawpixel.com/image/12255959/photo-image-sky-technology-public-domainFree Image from public domain license[Untitled photo, possibly related to: The Wells-Lemson quarry]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12281984/photo-image-sky-public-domain-lineFree Image from public domain license[Untitled photo, possibly related to: An Atchison, Topeka, and Santa Fe passenger train passing through the Flint Hills… https://www.rawpixel.com/image/12291491/photo-image-plant-sky-smokeFree Image from public domain license[Untitled photo, possibly related to: Las Vegas, Nevada. A view of the plant of Basic Magnesium Incorporated, showing… https://www.rawpixel.com/image/12298142/photo-image-plant-sky-roadFree Image from public domain licenseView taken from train en route to Forrest City, Arkansas from Memphis, Tennessee during the flood. Sourced from the Library… https://www.rawpixel.com/image/12252291/photo-image-person-sky-public-domainFree 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 license[Untitled photo, possibly related to: U.S. 1 (alternate) entering Baltimore, Maryland from the south]. Sourced from the… https://www.rawpixel.com/image/12262567/photo-image-plant-person-skyFree Image from public domain licenseHousing alongisde electric railroad. Milwaukee, Wisconsin. Sourced from the Library of Congress. https://www.rawpixel.com/image/12268650/photo-image-cloud-person-skyFree Image from public domain licenseLandscape near Fort Kent, Maine. Off Route 11. Sourced from the Library of Congress. https://www.rawpixel.com/image/12279086/photo-image-cloud-plant-grassFree Image from public domain licenseRailroad tracks at Hua Lampong station in Bangkok Thailand https://www.rawpixel.com/image/16872/premium-photo-image-retro-city-arrival-buildingView licenseBaltimore-Washington Boulevard. U. S. Highway No. 1. Baltimore, Maryland. Sourced from the Library of Congress. https://www.rawpixel.com/image/12276963/photo-image-plant-person-skyFree Image from public domain licenseTruck trail and fire break on Withlacoochee Land Use Project, Florida. Sourced from the Library of Congress. https://www.rawpixel.com/image/12270036/photo-image-cloud-plant-fireFree Image from public domain license[Untitled photo, possibly related to: Dust storm. Ramsey County, North Dakota]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12283936/photo-image-cloud-plant-skyFree Image from public domain licenseAir pollution desktop wallpaper https://www.rawpixel.com/image/11560049/air-pollution-desktop-wallpaperView licenseHighway on the New Hampshire side of the Connecticut River leading to Brattleboro, Vermont. Sourced from the Library of… https://www.rawpixel.com/image/12277353/photo-image-plant-person-skyFree Image from public domain licenseOld bicycle used as a sign for a repair shop in Thompsonville, Connecticut. Sourced from the Library of Congress. https://www.rawpixel.com/image/12275958/photo-image-plant-sky-treeFree Image from public domain license[Untitled photo, possibly related to: Drilling operations and derricks. Kilgore, Texas] by Russell Lee https://www.rawpixel.com/image/12174752/image-cloud-art-skyFree Image from public domain licenseSteelmill and workers' houses. Birmingham, Alabama. Sourced from the Library of Congress. https://www.rawpixel.com/image/12269064/photo-image-sky-technology-public-domainFree 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 licenseBingham Canyon, Utah. Blasting at the open-pit mine of the Utah Copper Company. Sourced from the Library of Congress. https://www.rawpixel.com/image/12295562/photo-image-sky-road-mountainFree Image from public domain license[Untitled photo, possibly related to: Houses and coal banks in Lansford, Pennsylvania]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12274944/photo-image-plant-person-skyFree Image from public domain licenseWheeler Dam, Alabama (TVA -Tennessee Valley Authority). Substation. Sourced from the Library of Congress. https://www.rawpixel.com/image/12300037/image-cloud-sky-technologyFree Image from public domain licenseCream Castle ice cream sign, W. Malone, Sikeston, Missouri (1979) photography in high resolution by John Margolies. Original… https://www.rawpixel.com/image/3799975/photo-image-vintage-retro-restaurantFree Image from public domain licenseWelaka wildlife and forest conservation project at Welaka, Florida. Sourced from the Library of Congress. https://www.rawpixel.com/image/12268895/photo-image-cloud-plant-personFree Image from public domain licenseGeneral store in Kenton, Michigan, one time center of lumbering operations on the upper peninsula. Sourced from the Library… https://www.rawpixel.com/image/12286482/photo-image-sky-public-domain-houseFree Image from public domain license[Untitled photo, possibly related to: Alva (vicinity), Oklahoma. Farm landscape along the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12290113/photo-image-cloud-sky-technologyFree Image from public domain licenseAlabama miners' houses near Birmingham, Alabama. Sourced from the Library of Congress. https://www.rawpixel.com/image/12266388/photo-image-person-sky-technologyFree Image from public domain license[Untitled photo, possibly related to: Las Vegas, Nevada. A mass of transmission towers and transformers redistributing power… https://www.rawpixel.com/image/12297895/photo-image-person-sky-technologyFree Image from public domain license[Untitled photo, possibly related to: Columbia Steel Company at Ironton, Utah. Exterior view of the blast furnace]. Sourced… https://www.rawpixel.com/image/12297784/photo-image-cloud-sky-smokeFree Image from public domain licenseLas Vegas, Nevada. A mass of transmission towers and transformers redistributing power from Boulder Dam to Basic Magnesium… https://www.rawpixel.com/image/12297607/photo-image-person-sky-technologyFree Image from public domain licenseAir pollution background https://www.rawpixel.com/image/11560051/air-pollution-backgroundView licenseCincinnati, Ohio. The shoreline as seen from the towboat Ernest T. Weir on the Ohio River. Sourced from the Library of… https://www.rawpixel.com/image/12295353/photo-image-sky-technology-public-domainFree Image from public domain licenseLas Vegas, Nevada. Transmission towers and transformers redistributing power from Boulder Dam to Basic Magnesium… https://www.rawpixel.com/image/12297614/photo-image-sky-technology-public-domainFree Image from public domain licenseWest Mine, West Frankfort, Illinois. Now abandoned. This mine has been down about a year. General caption: Many of the… https://www.rawpixel.com/image/12272660/photo-image-sky-technology-public-domainFree Image from public domain license[Untitled photo, possibly related to: Greenville, South Carolina. Air Service Command. Men of the 1067th signal company of… https://www.rawpixel.com/image/12296064/photo-image-cloud-plant-personFree Image from public domain licenseA Greyhound bus trip from Louisville, Kentucky, to Memphis, Tennessee, and the terminals. Rest stop between Louisville and… https://www.rawpixel.com/image/12297120/photo-image-plant-sky-treeFree Image from public domain licenseDust storm. Note heavy metal signs blown out by wind. Amarillo, Texas. Sourced from the Library of Congress. https://www.rawpixel.com/image/12251087/image-cloud-person-skyFree Image from public domain licenseDetroit, Michigan. Riot at the Sojourner Truth homes, a new U.S. federal housing project, caused by white neighbors' attempt… https://www.rawpixel.com/image/12290898/photo-image-person-sky-roadFree Image from public domain license