Vacationers on motorcycles, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8765661/photo-image-vintage-mountain-travelFree Image from public domain licenseDandelion Colorado--Uncompahgre National Forest. Original public domain image from Flickr https://www.rawpixel.com/image/8799372/photo-image-flower-plant-public-domainFree Image from public domain licenseForest of aspens at Owl Creek Pass, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799850/photo-image-plant-tree-public-domainFree Image from public domain licenseYoung Rial Redding, third generation of Reddings who have ranched in Sarpy Basin, joins the resistance movement. The… https://www.rawpixel.com/image/8765892/photo-image-vintage-kid-redFree Image from public domain licenseThis 750-megawatt power plant, located on the north platte river, is part of the massive strip-mining development planned… https://www.rawpixel.com/image/8765528/photo-image-vintage-textFree Image from public domain licenseMt. Wilson and West Dolores River, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8803011/photo-image-clouds-plant-skyFree Image from public domain licenseRoad leads to the Bud and John Redding Ranches in Sarpy Basin, 06/1973. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8802846/photo-image-plant-grass-skyFree Image from public domain licenseThunderclouds over grassy plateau, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802870/photo-image-cloud-plant-personFree Image from public domain licenseFlowering arnica herb, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8803006/photo-image-flower-plant-grassFree Image from public domain licenseSouth fork of Rio Grande River near Wolf Creek Pass, 05/1972. Photographer: Norton, Boyd. Original public domain image from… https://www.rawpixel.com/image/8802878/photo-image-ocean-nature-waterFree Image from public domain licenseSign for roadside curio shop, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802552/photo-image-mountain-nature-landscapeFree Image from public domain licenseGreat Sand Dunes National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799836/photo-image-public-domain-mountain-natureFree Image from public domain licenseSign in a restroom along Interstate 25 south of Colorado Springs, Colorado, warns that water is undrinkable, 04/1974.… https://www.rawpixel.com/image/8799708/photo-image-public-domain-banner-alphabetFree Image from public domain licenseWindmill on the rolling ranch lands near Powder River Wyoming, 06/1973. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8799686/photo-image-public-domain-nature-wind-turbineFree Image from public domain licenseOrange mallow, showy desert flower, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802876/photo-image-rose-flower-plantFree Image from public domain licenseView of Colorado's front range beyond urban and industrial sprawl, 05/1975. Photographer: Norton, Boyd. Original public… https://www.rawpixel.com/image/8802830/photo-image-person-vintage-cityFree Image from public domain licenseWheat field on the Redding ranch in Sarpy Basin, 06/1973. Photographer: Norton, Boyd. Original public domain image from… https://www.rawpixel.com/image/8802678/photo-image-plant-person-grassFree Image from public domain licenseWhite canyon, near the Sipapu Bridge Natural Bridges National Monument, 05/1972. Photographer: Norton, Boyd. Original public… https://www.rawpixel.com/image/8799831/photo-image-plant-tree-skyFree Image from public domain licenseFour stories high, square tower house, was built about 800 years ago in a shallow cave of Navajo Canyon, 05/1972.… https://www.rawpixel.com/image/8799830/photo-image-public-domain-house-natureFree Image from public domain licenseEast Dallas Creek, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799829/photo-image-public-domain-mountain-oceanFree Image from public domain licenseEast Dallas Creek, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799828/photo-image-plant-tree-public-domainFree Image from public domain licenseEast Dallas Creek, 05/1972. Original public domain image from Flickr https://www.rawpixel.com/image/8799898/photo-image-public-domain-mountain-natureFree Image from public domain licenseAn inflated polyethylene greenhouse serves as the entrance to the office of the University of Arizona Environmental Research… https://www.rawpixel.com/image/8802986/photo-image-flower-plant-artFree Image from public domain licenseHovenweep National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802980/photo-image-paper-flower-plantFree Image from public domain licenseDragonfly on marsh grass near Sarpy Basin, 06/1973. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802974/photo-image-plant-grass-animalFree Image from public domain licenseCliff Palace - first major Indian ruins discovered in the Mesa Verde, 05/1972. Photographer: Norton, Boyd. Original public… https://www.rawpixel.com/image/8803005/photo-image-art-light-woodFree Image from public domain licenseGrass mounds, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802875/photo-image-grass-mountain-natureFree Image from public domain licenseWhite poppy, desert flower, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802874/photo-image-flower-plant-natureFree Image from public domain licenseFlowers and rock formations at the Roy Fly ranch in Sarpy Basin, 06/1973. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8802971/photo-image-mountain-nature-soilFree Image from public domain licenseSolar heating and cooling demonstration project, which is funded by the National Science Foundation. https://www.rawpixel.com/image/8802833/photo-image-house-nature-landscapeFree Image from public domain licenseMoon over forest, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802860/photo-image-moon-space-treesFree Image from public domain licenseRock formations owe reddish hue to traces of iron oxide, 05/1972. Photographer: Norton, Boyd. Original public domain image… https://www.rawpixel.com/image/8802982/photo-image-mountain-nature-redFree Image from public domain licenseHome of architect Richard Crowther, that is heated with solar energy collected by flat plate collectors. https://www.rawpixel.com/image/8802993/photo-image-plant-grass-houseFree Image from public domain licenseEvening primrose, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802877/photo-image-flower-plant-leafFree Image from public domain licenseA trainload of coal from the Western Energy mine near Colstrip passes through a landscape of old strip mining spoil piles… https://www.rawpixel.com/image/8802679/photo-image-nature-soil-vintageFree Image from public domain licenseGreat Sand Dunes National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802869/photo-image-mountain-nature-landscapeFree Image from public domain licenseTomatoes being raised in the solar greenhouse of the University of Arizona's laboratory near Tucson. https://www.rawpixel.com/image/8802677/photo-image-plant-food-fruitFree Image from public domain licenseOld country store near Show Low, 04/1974. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802673/photo-image-food-vintage-coffee-cupFree Image from public domain licenseCloseup view of tomatoes inside one of the solar greenhouses at the University of Arizona Environmental Research Laboratory… https://www.rawpixel.com/image/8802706/photo-image-plant-food-fruitFree Image from public domain licenseEnglemann prickley pear cactus growing outside a solar heated greenhouse at the University of Arizona Environmental Research… https://www.rawpixel.com/image/8802851/photo-image-plant-art-paintingFree Image from public domain license350 megawatt power plant under construction at Colstrip, 06/1973. Photographer: Norton, Boyd. Original public domain image… https://www.rawpixel.com/image/8802548/photo-image-plant-construction-vintageFree Image from public domain licenseTrading post, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802695/photo-image-christmas-art-lightFree Image from public domain licenseAlpine meadow, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802694/photo-image-flower-plant-treeFree Image from public domain licenseGarter snake in Harris Wash, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802543/photo-image-animal-nature-waterFree Image from public domain licenseNear East Dallas Creek, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802688/photo-image-flower-plant-natureFree Image from public domain licenseBarrel cactus in bloom. Hovenweep National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from… https://www.rawpixel.com/image/8799833/photo-image-plant-vintage-public-domainFree Image from public domain licenseBananas being grown in a section of the University of Arizona's Environmental Research Laboratory near Tucson. Solar heated… https://www.rawpixel.com/image/8799727/photo-image-plant-public-domain-fishFree Image from public domain licenseMule deer. Great Sand Dunes National Monument. Original public domain image from Flickr https://www.rawpixel.com/image/8799755/photo-image-public-domain-nature-animalFree Image from public domain licenseUncompahgre National Forest, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799682/photo-image-plant-tree-public-domainFree Image from public domain licenseWindmill and power lines near the Dave Johnston Power Plant, 06/1973. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8799680/photo-image-vintage-public-domainFree Image from public domain licenseBlackened aluminum collector cups are the heart of the solar energy collector developed by the International Solarthermics… https://www.rawpixel.com/image/8799741/photo-image-heart-public-domain-foodFree Image from public domain licenseHovenweep National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799858/photo-image-plant-tree-public-domainFree Image from public domain licenseColorado--Uncompahgre National Forest, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8799855/photo-image-face-plant-treeFree Image from public domain licenseCliff Palace was once a village of over 200 rooms and 23 kivas (ceremonial spaces), 05/1972. Photographer: Norton, Boyd.… https://www.rawpixel.com/image/8799837/photo-image-public-domain-nature-brickFree Image from public domain licenseThis 750-megawatt power plant, located on the north platte river, is part of the massive strip-mining development planned… https://www.rawpixel.com/image/8799379/photo-image-smoke-public-domainFree Image from public domain licenseTravel plan Instagram post template design https://www.rawpixel.com/image/14930243/travel-plan-instagram-post-template-designView licenseThe solar furnace at White Sands Missile Range, Alamogordo New Mexico. https://www.rawpixel.com/image/8802853/photo-image-light-flare-interior-designFree Image from public domain licenseOrange mallow - showy desert flowers, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802983/photo-image-flower-plant-artFree Image from public domain license"Teepee" burner incinerates lumber mill's waste, 05/1972. Photographer: Norton, Boyd. Original public domain image from… https://www.rawpixel.com/image/8803014/photo-image-art-smoke-paintingFree Image from public domain licenseCaterpillars in flowering tree, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8803013/photo-image-flower-plant-leafFree Image from public domain licenseCliff Palace is the largest ruin discovered in Mesa Verde. It was once a village of over 200 rooms and 23 kivas (ceremonial… https://www.rawpixel.com/image/8802879/photo-image-trees-soil-constructionFree Image from public domain licenseThis parabolic mirror system is part of the solar furnace operated for the U.S. Army at White Sands Missile Range… https://www.rawpixel.com/image/8803009/photo-image-vintage-city-buildingFree Image from public domain licenseSipapu Bridge, White Canyon. Natural Bridges National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8803010/photo-image-mountain-nature-landscapeFree Image from public domain licenseLush tropical garden inside a solar heated greenhouse at the University of Arizona Environmental Research Laboratory at… https://www.rawpixel.com/image/8803007/photo-image-plant-palm-tree-artFree Image from public domain licenseCliff Palace is the largest remaining village of the pre-Columbian Indians. They lived in the Mesa Verde area until drought… https://www.rawpixel.com/image/8802872/photo-image-brick-wall-windowFree Image from public domain licenseTwo inflated polyethylene solar heated "greenhouses" located at the University of Arizona Environmental Research Laboratory… https://www.rawpixel.com/image/8802998/photo-image-vintage-building-architectureFree Image from public domain licenseExterior view of several of the solar heated greenhouses at the University of Arizona Environmental Research Laboratory at… https://www.rawpixel.com/image/8802999/photo-image-nature-vintage-cityFree Image from public domain licenseExterior view of one of the solar greenhouses at the University of Arizona Environmental Research Laboratory at Tucson. https://www.rawpixel.com/image/8802997/photo-image-nature-water-soilFree Image from public domain licenseThis is a demonstration unit of a backyard solar heating unit built by the Sunglow Corporation, under license from the… https://www.rawpixel.com/image/8802824/photo-image-wood-vintage-buildingFree Image from public domain licenseEroded sandstone, part of Indian ruins dating from 1100 to 1300 A.D., 05/1972. Photographer: Norton, Boyd. Original public… https://www.rawpixel.com/image/8802994/photo-image-nature-brick-soilFree Image from public domain licenseClose-up of stream bed illustrates the dry climate of the proposed strip-mining area of Sarpy Basin. Mining operation would… https://www.rawpixel.com/image/8802957/photo-image-texture-brick-soilFree Image from public domain licenseExposed root system at eroded bank. Hovenweep National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8802984/photo-image-plant-tree-natureFree Image from public domain licenseSolar greenhouse owned and built by Peter Howell, located at about the 8,500 foot level in the front range. https://www.rawpixel.com/image/8803008/photo-image-nature-vintage-gardenFree Image from public domain licenseWestern garter snake on the shore of the Snake River in Hells Canyon. Judging by the bulge, the snake has recently lunched-… https://www.rawpixel.com/image/8802562/photo-image-animal-soil-vintageFree Image from public domain licenseConstruction equipment at the site of the new railroad which will transport coal from the Westmoreland Coal Company… https://www.rawpixel.com/image/8802674/photo-image-nature-vintage-tractorFree Image from public domain licenseA juvenile shrimp being raised at the University of Arizona Environmental Research Laboratory at Tucson in their high… https://www.rawpixel.com/image/8802556/photo-image-vintage-snake-lizardFree Image from public domain licenseThe Snake River winds through Hells Canyon, wildest and deepest gorge in the North American continent, 05/1973.… https://www.rawpixel.com/image/8802555/photo-image-person-mountain-natureFree Image from public domain licenseShiprock in smog - photographed from Mesa Verde, 05/1972. Photographer: Norton, Boyd. Original public domain image from… https://www.rawpixel.com/image/8802708/photo-image-cloud-sunset-skyFree Image from public domain licenseAcme coal mine, 06/1973. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802857/photo-image-vintage-road-coalFree Image from public domain licenseRaft begins dizzying plunge down Wild Sheep Rapid on the Snake River. Raft was one of several taking part in a conservation… https://www.rawpixel.com/image/8802856/photo-image-person-light-mountainFree Image from public domain licenseOil wells near Teapot Dome, Wyoming, 06/1973. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802855/photo-image-person-vintage-humanFree Image from public domain licenseBarrel cactus. Hovenweep National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802551/photo-image-plant-nature-redFree Image from public domain licenseModular solar-heated house built near Corrales, New Mexico, features interconnected units of aluminum with a urethane inner… https://www.rawpixel.com/image/8802702/photo-image-person-house-natureFree Image from public domain licenseAlfalfa field near the Tongue River, 06/1973. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802850/photo-image-nature-vintage-rugFree Image from public domain licenseSolar heating and cooling demonstration project, which is funded by the National Science Foundation..., 05/1975.… https://www.rawpixel.com/image/8802573/photo-image-plant-grass-natureFree Image from public domain licenseGreat Sand Dunes National Monument, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802697/photo-image-plant-tree-wolfFree Image from public domain licenseFrog in marshy stream near Sarpy Basin, 06/1973. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802544/photo-image-plant-grass-animalFree Image from public domain licenseBreakup of a storm over Pike's Peak, 04/1974. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802570/photo-image-cloud-sky-lightFree Image from public domain licenseModern graffiti carved into rock near Cliff Palace, 05/1972. Photographer: Norton, Boyd. Original public domain image from… https://www.rawpixel.com/image/8802692/photo-image-texture-art-brickFree Image from public domain licenseThis is a heliostat, a plane surface consisting of many flat mirrors, about 60 feet tall which is part of the solar furnace… https://www.rawpixel.com/image/8802716/photo-image-person-light-pillarFree Image from public domain licenseForest near Wolf Creek Pass, 05/1972. Photographer: Norton, Boyd. Original public domain image from Flickr https://www.rawpixel.com/image/8802887/photo-image-plant-tree-wolfFree Image from public domain licenseNest in prairie grasses on a ranch in the Powder River Basin, 06/1973. Photographer: Norton, Boyd. Original public domain… https://www.rawpixel.com/image/8802537/photo-image-animal-vintage-snakeFree Image from public domain licenseGreat Sand Dunes National Monument. Original public domain image from Flickr https://www.rawpixel.com/image/8799848/photo-image-public-domain-nature-grassFree Image from public domain license