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    Water flowing out of base of dam at hydroelectric power station in Perthshire, Scotland — Stock Photo
    Water flowing out of base of dam at hydroelectric power station in Perthshire, Scotland
    Hydroelectric pipeline and dam at hydroelectric power station on loch in Perthshire, Scotland — Stock Photo
    Hydroelectric pipeline and dam at hydroelectric power station on loch in Perthshire, Scotland
    Turbines at wind farm near Vredendal, Western Cape, South Africa. — Stock Photo
    Turbines at wind farm near Vredendal, Western Cape, South Africa.
    Rear view of an engineer at a solar farm carrying a solar panel, Thailand — Stock Photo
    Rear view of an engineer at a solar farm carrying a solar panel, Thailand
    Rows of wind turbines, Eemshaven, Groningen, Netherlands — Stock Photo
    Rows of wind turbines, Eemshaven, Groningen, Netherlands
    Couple walking with grandson on rural road — Stock Photo
    Couple walking with grandson on rural road
    Side view of cheerful female in casual wear and gumshoes walking looking at camera with outstretched arms above tiled walkway in city — Stock Photo
    Side view of cheerful female in casual wear and gumshoes walking looking at camera with outstretched arms above tiled walkway in city
    Scenic view of Wind farm along the Dollard, East Frisia, Lower Saxony, Germany — Stock Photo
    Scenic view of Wind farm along the Dollard, East Frisia, Lower Saxony, Germany
    Engineers standing at the entrance of wind mill at a wind farm — Stock Photo
    Engineers standing at the entrance of wind mill at a wind farm
    Row of solar panels at solar farm in North Wales, UK. — Stock Photo
    Row of solar panels at solar farm in North Wales, UK.
    Aerial view of lake Mooserboden and dam wall, Kaprun High Mountain reservoirs, Salzburg, Austria — Stock Photo
    Aerial view of lake Mooserboden and dam wall, Kaprun High Mountain reservoirs, Salzburg, Austria
    Ginger boy looking at camera — Stock Photo
    Ginger boy looking at camera
    Girls and boys in a classroom — Stock Photo
    Girls and boys in a classroom
    Family running in water on beach — Stock Photo
    Family running in water on beach
    Young strong African American sportsman in boxing hand wraps working out and looking at camera in building — Stock Photo
    Young strong African American sportsman in boxing hand wraps working out and looking at camera in building
    Wind turbines in country field under cloudscape — Stock Photo
    Wind turbines in country field under cloudscape
    Wind turbines in distance beyond bay, Morecambe Bay, UK — Stock Photo
    Wind turbines in distance beyond bay, Morecambe Bay, UK
    Male worker talking on mobile phone at desk in office — Stock Photo
    Male worker talking on mobile phone at desk in office
    Full length smiling mature female in sportswear and boxing gloves standing with helmet in hand against blue wall and looking at camera — Stock Photo
    Full length smiling mature female in sportswear and boxing gloves standing with helmet in hand against blue wall and looking at camera
    Windmill on filed over hills — Stock Photo
    Windmill on filed over hills
    Aerial view of alpine dam and reservoir lake Kolnbreinsperre, Malta valley, Carinthia, Austria — Stock Photo
    Aerial view of alpine dam and reservoir lake Kolnbreinsperre, Malta valley, Carinthia, Austria
    Full body of concentrated African American teen dancing with hands outstretched in studio with bright neon light — Stock Photo
    Full body of concentrated African American teen dancing with hands outstretched in studio with bright neon light
    Young male worker holding carabiner at solar station — Stock Photo
    Young male worker holding carabiner at solar station
    Male worker using laptop at solar station on a sunny day — Stock Photo
    Male worker using laptop at solar station on a sunny day
    Workers standing on wind turbine in rural landscape — Stock Photo
    Workers standing on wind turbine in rural landscape
    Wind turbines at sunset; Nanticoke, Ontario, Canada — Stock Photo
    Wind turbines at sunset; Nanticoke, Ontario, Canada
    High voltage towers and power lines in Utah, USA — Stock Photo
    High voltage towers and power lines in Utah, USA
    Engineers standing at the entrance of wind mill at a wind farm — Stock Photo
    Engineers standing at the entrance of wind mill at a wind farm
    Engineer using a digital tablet at a wind farm — Stock Photo
    Engineer using a digital tablet at a wind farm
    Wind power turbines — Stock Photo
    Wind power turbines
    Engineer using a laptop at entrance of a wind mill at a wind farm — Stock Photo
    Engineer using a laptop at entrance of a wind mill at a wind farm
    Rows of solar panels at solar farm in North Wales, UK. — Stock Photo
    Rows of solar panels at solar farm in North Wales, UK.
    Wind turbines on a wind farm, Albany, Western Australia, Australia — Stock Photo
    Wind turbines on a wind farm, Albany, Western Australia, Australia
    Cute little boys playing — Stock Photo
    Cute little boys playing
    Mitochondria cross-section, illustration. Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They oxidise sugars and fats to produce energy in a process called cellular respiration — Stock Photo
    Mitochondria cross-section, illustration. Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They oxidise sugars and fats to produce energy in a process called cellular respiration
    Worker standing on wind turbine in rural landscape — Stock Photo
    Worker standing on wind turbine in rural landscape
    Wind turbines on a blue sky background — Stock Photo
    Wind turbines on a blue sky background
    Friends in the swimming pool — Stock Photo
    Friends in the swimming pool
    African American teenage girl enjoying music in headphones in neon studio — Stock Photo
    African American teenage girl enjoying music in headphones in neon studio
    Wind turbines in crop field. — Stock Photo
    Wind turbines in crop field.
    Engineer holding a layout plot at a wind farm — Stock Photo
    Engineer holding a layout plot at a wind farm
    Wind turbines with maintenance access road; Campillos, Malaga, Andalucia, Spain — Stock Photo
    Wind turbines with maintenance access road; Campillos, Malaga, Andalucia, Spain
    Engineer using a laptop at wind farm — Stock Photo
    Engineer using a laptop at wind farm
    Wind farm against blue sky during daytime — Stock Photo
    Wind farm against blue sky during daytime
    High angle view of solar panels in an industry — Stock Photo
    High angle view of solar panels in an industry
    African American teenage girl enjoying music in headphones in neon studio — Stock Photo
    African American teenage girl enjoying music in headphones in neon studio
    Power engineer looking at surface of panels at solar photovoltaic array — Stock Photo
    Power engineer looking at surface of panels at solar photovoltaic array
    Mid section of engineer adjusting his harness outside the wind mill — Stock Photo
    Mid section of engineer adjusting his harness outside the wind mill
    Full length smiling mature female in sportswear and boxing gloves standing with helmet in hand against blue wall and looking away — Stock Photo
    Full length smiling mature female in sportswear and boxing gloves standing with helmet in hand against blue wall and looking away
    Aerial view of lake Mooserboden and dam wall, Kaprun High Mountain reservoirs, Salzburg, Austria — Stock Photo
    Aerial view of lake Mooserboden and dam wall, Kaprun High Mountain reservoirs, Salzburg, Austria
    Solar panels on farm near Black Diamond, Alberta, Canada. — Stock Photo
    Solar panels on farm near Black Diamond, Alberta, Canada.
    Scenic view of Solar photovoltaic array — Stock Photo
    Scenic view of Solar photovoltaic array
    Young male worker climbing scaffolding at solar station — Stock Photo
    Young male worker climbing scaffolding at solar station
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, listening to music with earphones on drinking water during a break — Stock Photo
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, listening to music with earphones on drinking water during a break
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, running and listening to music with earphones on — Stock Photo
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, running and listening to music with earphones on
    Springtime aerial view showing the Kahea Wind Power wind farm on West Maui, Hawaii, USA — Stock Photo
    Springtime aerial view showing the Kahea Wind Power wind farm on West Maui, Hawaii, USA
    Three wind turbines — Stock Photo
    Three wind turbines
    Row of wind turbines on a hill — Stock Photo
    Row of wind turbines on a hill
    Wind turbine farm, zaragoza province, aragon, spain — Stock Photo
    Wind turbine farm, zaragoza province, aragon, spain
    Young strong African American sportsman in boxing hand wraps working out and looking at camera in building — Stock Photo
    Young strong African American sportsman in boxing hand wraps working out and looking at camera in building